Rackspace Hosting (RAX) 10-K 3 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 27, 2014	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'RACKSPACE HOSTING, INC.	'	'
Entity Central Index Key	'0001107694	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	141,832,652	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$2,160,083,173

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$259,733	$292,061
Accounts receivable, net of allowance for doubtful accounts and customer credits of $4,236 as of December 31, 2012 and $3,891 as of December 31, 2013	123,898	92,834
Deferred income taxes	12,637	10,320
Prepaid expenses	30,782	25,195
Other current assets	11,918	4,835
Total current assets	438,968	425,245
Property and equipment, net	890,776	724,985
Goodwill	81,084	68,742
Intangible assets, net	23,880	23,802
Other non-current assets	57,089	52,777
Total assets	1,491,797	1,295,551
Current liabilities:	'	'
Accounts payable and accrued expenses	122,047	105,174
Accrued compensation and benefits	62,459	48,404
Income and other taxes payable	11,388	21,550
Current portion of deferred revenue	22,868	17,265
Current portion of obligations under capital leases	37,885	61,302
Current portion of debt	1,861	1,744
Total current liabilities	258,508	255,439
Non-current liabilities:	'	'
Deferred revenue	3,662	3,695
Obligations under capital leases	25,048	60,335
Debt	124	1,991
Deferred income taxes	69,729	71,081
Deferred rent	43,046	32,293
Other liabilities	36,268	27,070
Total liabilities	436,385	451,904
COMMITMENTS AND CONTINGENCIES	'	'
Stockholders' equity:	'	'
Common stock, $0.001 par value per share: 300,000,000 shares authorized; 137,797,855 shares issued and outstanding as of December 31, 2012; 141,123,904 shares issued and outstanding as of December 31, 2013	141	138
Additional paid-in capital	636,660	515,188
Accumulated other comprehensive loss	-4,536	-8,089
Retained earnings	423,147	336,410
Total stockholders’ equity	1,055,412	843,647
Total liabilities and stockholders' equity	$1,491,797	$1,295,551

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Current assets:	'	'
Allowance for doubtful accounts and customer credits	$3,891	$4,236
Stockholders' equity:	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	141,123,904	137,797,855
Common stock, shares outstanding	141,123,904	137,797,855

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net revenue	$1,534,786	$1,309,239	$1,025,064
Costs and expenses:	'	'	'
Cost of revenue	492,493	419,013	346,341
Research and development	90,213	56,736	33,709
Sales and marketing	208,417	166,172	131,174
General and administrative	297,520	244,732	194,957
Depreciation and amortization	313,007	249,845	195,412
Total costs and expenses	1,401,650	1,136,498	901,593
Income from operations	133,136	172,741	123,471
Other income (expense):	'	'	'
Interest expense	-3,118	-4,749	-5,848
Interest and other income (expense)	741	15	-1,194
Total other income (expense)	-2,377	-4,734	-7,042
Income before income taxes	130,759	168,007	116,429
Income taxes	44,022	62,589	40,018
Net income	86,737	105,418	76,411
Other comprehensive income, net of tax	'	'	'
Foreign currency translation adjustments	3,553	6,643	-2,316
Other comprehensive income (loss)	3,553	6,643	-2,316
Comprehensive income	$90,290	$112,061	$74,095
Net income per share	'	'	'
Basic	$0.63	$0.78	$0.59
Diluted	$0.61	$0.75	$0.55
Weighted average number of shares outstanding	'	'	'
Basic	138,577	135,279	129,922
Diluted	143,011	141,265	138,064

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities	'	'	'
Net income	$86,737	$105,418	$76,411
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	313,007	249,845	195,412
Loss on disposal of equipment, net	992	1,586	247
Provision for bad debts and customer credits	4,498	6,300	5,913
Deferred income taxes	-2,102	-775	13,991
Deferred rent	11,564	9,259	9,471
Share-based compensation expense	59,645	41,546	28,773
Excess tax benefits from share-based compensation arrangements	-33,539	-46,046	-20,627
Changes in certain assets and liabilities:	'	'	'
Accounts receivable	-34,473	-29,265	-26,805
Prepaid expenses and other current assets	-12,270	-4,903	1,800
Accounts payable and accrued expenses	35,303	66,268	38,886
Deferred revenue	5,367	2,185	-482
All other operating activities	9,331	-1,919	1,405
Net cash provided by operating activities	444,060	399,499	324,395
Cash Flows From Investing Activities	'	'	'
Purchases of property and equipment	-452,596	-270,374	-251,214
Acquisitions, net of cash acquired	-9,930	-5,945	-952
All other investing activities	-1,698	98	168
Net cash used in investing activities	-464,224	-276,221	-251,998
Cash Flows From Financing Activities	'	'	'
Principal payments of capital leases	-65,860	-75,928	-65,778
Principal payments of notes payable	-1,915	-1,962	-1,913
Payments for debt issuance costs	0	0	-1,114
Payments for deferred acquisition obligations	-1,353	-6,176	-5,299
Proceeds from notes payable	0	691	0
Receipt of Texas Enterprise Fund Grant	0	3,500	0
Proceeds from employee stock plans	23,817	41,284	36,287
Excess tax benefits from share-based compensation arrangements	33,539	46,046	20,627
Net cash provided by (used in) financing activities	-11,772	7,455	-17,190
Effect of exchange rate changes on cash and cash equivalents	-392	1,472	-292
Increase (decrease) in cash and cash equivalents	-32,328	132,205	54,915
Cash and cash equivalents, beginning of period	292,061	159,856	104,941
Cash and cash equivalents, end of period	259,733	292,061	159,856
Supplemental cash flow information:	'	'	'
Acquisition of property and equipment by vendor financed capital leases	7,190	59,833	75,090
Acquisition of property and equipment by vendor financed notes payable	0	3,950	0
Increase in property and equipment in accounts payable and accrued expenses	12,303	3,525	18,590
Non-cash purchases of property and equipment	19,493	67,308	93,680
Shares issued in business combinations	4,457	2,745	0
Cash payments for interest, net of amount capitalized	3,234	4,900	5,577
Cash payments for income taxes	$15,670	$12,574	$19,088

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
In Thousands, except Share data, unless otherwise specified
Balance ($) at Dec. 31, 2010	$438,863	$127	$296,571	($12,416)	$154,581
Balance (shares) at Dec. 31, 2010	'	126,950,468	'	'	'
Issuance of common stock	'	'	'	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) ($)	55,863	5	55,858	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) (shares)	'	4,913,504	'	'	'
Stock-based activity and issuance of common stock to board of directors ($)	779	0	779	'	'
Stock-based activity and issuance of common stock to board of directors (shares)	'	23,102	'	'	'
Issuance of shares from Employee Stock Purchase Plans ($)	1,050	0	1,050	'	'
Issuance of shares from Employee Stock Purchase Plans (shares)	'	25,755	'	'	'
Issuance of shares in acquisitions ($)	0	'	'	'	'
Total issuance of common stock ($)	57,692	5	57,687	'	'
Total issuance of common stock (shares)	'	4,962,361	'	'	'
Share-based compensation expense	28,773	'	28,773	'	'
Net income	76,411	'	'	'	76,411
Cumulative translation adjustment	-2,316	'	'	-2,316	'
Balance ($) at Dec. 31, 2011	599,423	132	383,031	-14,732	230,992
Balance (shares) at Dec. 31, 2011	'	131,912,829	'	'	'
Issuance of common stock	'	'	'	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) ($)	82,314	6	82,308	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) (shares)	'	5,689,164	'	'	'
Stock-based activity and issuance of common stock to board of directors ($)	542	0	542	'	'
Stock-based activity and issuance of common stock to board of directors (shares)	'	12,862	'	'	'
Issuance of shares from Employee Stock Purchase Plans ($)	5,016	0	5,016	'	'
Issuance of shares from Employee Stock Purchase Plans (shares)	'	137,104	'	'	'
Issuance of shares in acquisitions ($)	2,745	0	2,745	'	'
Issuance of shares in acquisitions (shares)	'	45,896	'	'	'
Total issuance of common stock ($)	90,617	6	90,611	'	'
Total issuance of common stock (shares)	'	5,885,026	'	'	'
Share-based compensation expense	41,546	'	41,546	'	'
Net income	105,418	'	'	'	105,418
Cumulative translation adjustment	6,643	'	'	6,643	'
Balance ($) at Dec. 31, 2012	843,647	138	515,188	-8,089	336,410
Balance (shares) at Dec. 31, 2012	'	137,797,855	'	'	'
Issuance of common stock	'	'	'	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) ($)	51,187	3	51,184	'	'
Exercise of stock options and release of stock awards (including excess tax benefit) (shares)	'	3,027,169	'	'	'
Issuance of shares from Employee Stock Purchase Plans ($)	6,186	0	6,186	'	'
Issuance of shares from Employee Stock Purchase Plans (shares)	'	190,235	'	'	'
Issuance of shares in acquisitions ($)	4,457	0	4,457	'	'
Issuance of shares in acquisitions (shares)	'	108,645	'	'	'
Total issuance of common stock ($)	61,830	3	61,827	'	'
Total issuance of common stock (shares)	'	3,326,049	'	'	'
Share-based compensation expense	59,645	'	59,645	'	'
Net income	86,737	'	'	'	86,737
Cumulative translation adjustment	3,553	'	'	3,553	'
Balance ($) at Dec. 31, 2013	$1,055,412	$141	$636,660	($4,536)	$423,147
Balance (shares) at Dec. 31, 2013	'	141,123,904	'	'	'

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parentheticals) (Additional Paid-In Capital, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Additional Paid-In Capital	'	'	'
Excess tax benefit included in exercise of stock options and release of stock awards	$33,539	$46,046	$20,627

Company_Overview_Basis_of_Pres

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies [Abstract]	'
Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies	'
	Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies
	Nature of Operations
	As used in this report, the terms “Rackspace,” “Rackspace Hosting,” “we,” “our company,” “the company,” “us,” or “our” refer to Rackspace Hosting, Inc. and its subsidiaries. Rackspace Hosting, Inc., through its operating subsidiaries, is a provider of cloud computing services, managing web-based IT systems for small and medium-sized businesses as well as large enterprises. We focus on providing a service experience for our customers, which we call Fanatical Support.
	Our operations began in 1998 as a limited partnership, and Rackspace Hosting, Inc. was incorporated in Delaware in March 2000.
	Basis of Consolidation
	The consolidated financial statements include the accounts of Rackspace Hosting and our wholly-owned subsidiaries, which include, among others, Rackspace US, Inc., our domestic operating entity, and Rackspace Limited, our United Kingdom operating entity. Intercompany transactions and balances have been eliminated in consolidation.
	Basis of Presentation
	Certain reclassifications have been made to prior year balances in order to conform to the current year’s presentation. These include reclassifications within the Consolidated Statements of Comprehensive Income that we believe provide greater transparency and clarity about our costs and expenses. The changes to the Consolidated Statements of Comprehensive Income are summarized as follows:
	•	Certain costs (primarily salaries and certain benefits) that were previously included in General and Administrative expenses have been reclassified to either Cost of Revenue or Sales and Marketing expenses because we believe the personnel or activities are directly related to supporting our customers, operating our data centers or selling and marketing our products and services.
	•	Certain costs that were previously included in General and Administrative expenses have been reclassified to a new category, Research and Development costs. Our research and development efforts are focused on the deployment of new technologies to address emerging trends, the development and evolution of proprietary tools, and the enhancement of systems and processes for sales and support. Included in this category are costs related to preliminary project assessment, research and development, re-engineering, training, and application maintenance. These costs are consistent with the definition of research and development activities in the Financial Accounting Standard Board's Accounting Standards Codification Topic 730, Research and Development.
	The changes do not affect the Company's previously reported Income from Operations or Net Income for the years ended December 31, 2011 and 2012 or amounts in the Consolidated Balance Sheet as of December 31, 2012 and Consolidated Statements of Cash Flows for the years ended December 31, 2011 and 2012.
	The table below summarizes the amount by which each category in the Consolidated Statement of Comprehensive Income increased/(decreased) for each period:
		Year Ended December 31,
	(In thousands)	2011			2012
	Cost of revenue	$	37,246		$	51,534
	Research and development	$	33,709		$	56,736
	Sales and marketing	$	4,669		$	8,064
	General and administrative	$	(75,624	)	$	(116,334	)
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States ("GAAP") requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, we evaluate our estimates, including those related to accounts receivable and customer credits, property and equipment, fair values of intangible assets and goodwill, useful lives of intangible assets, fair value of share-based compensation, contingencies, and income taxes, among others. Whenever possible, we base our estimates and assumptions on historical experience. However, certain estimates require us to make assumptions about expected future cash flow, events and usage patterns that we cannot influence or control. Our judgments, assumptions and estimates are based upon facts and circumstances known to us when we prepare the financial statements and that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities or recording revenue and expenses in our financial statements. Changes in facts and circumstances may cause us to change our assumptions and estimates in future periods, and it is possible that actual results could differ from our estimates. We engaged third-party consultants to assist management in the valuation of acquired assets, including other intangibles, as well as share-based compensation.
	Concentrations of Risk
	Our revenue is primarily derived from cloud computing, the market for which is highly competitive and rapidly changing. Significant changes in this industry or changes in customer buying behavior could adversely impact our operating results. See the Segment Information footnote for information concerning operations located outside of the U.S.
	Financial instruments, which could potentially subject us to concentrations of credit risk, consist principally of cash and cash equivalents and accounts receivable. We place our cash and cash equivalents in money market accounts with high credit quality financial institutions; however, the balance may exceed applicable insurance limits or may not be insured. While we monitor the balances in our accounts and adjust these balances as appropriate, they could be impacted if the underlying depository institutions fail or could be subject to other adverse conditions in the financial markets. To date, we have experienced no material loss or lack of access to our invested cash and cash equivalents; however, we can provide no assurances that access to our funds will not be impacted by adverse conditions in the financial markets.
	We perform ongoing credit evaluations, and collateral is generally not required for trade receivables. At December 31, 2012 and 2013, no customer, reseller or strategic partner comprised more than 10% of total accounts receivable.
	We rely on equipment and software purchased from third parties to provide our services. This equipment and software may not continue to be available on commercially reasonable terms, and equipment may not be available in quantities sufficient to meet our business needs. Any errors or defects in third-party equipment and software could result in errors or a failure of our service, which could harm our business. Indemnification from equipment and software providers, if any, would likely be insufficient to cover any damage to our business or our customers resulting from such failures.
	Significant Accounting Policies
	The accompanying financial statements reflect the application of certain significant accounting policies. There have been no material changes to our significant accounting policies that are disclosed in our audited consolidated financial statements and notes thereto during 2013.
	Cash and Cash Equivalents
	For the purposes of the consolidated financial statements, we consider all highly liquid investments with original maturities of three months or less when acquired to be cash equivalents. Our available cash and cash equivalents are held in bank deposits, overnight sweep accounts, and money market funds. Gains and losses are included in interest and other income in our accompanying consolidated statements of comprehensive income.
	Accounts Receivable, Net
	We classify as trade accounts receivable amounts due within twelve months, arising from the provision of services in the normal course of business. We assess collectibility based on a number of factors, including customer payment history and creditworthiness. We generally do not request collateral from our customers, although in certain cases we may require the customer to prepay for services. When evaluating the adequacy of allowances, we analyze accounts receivable, current economic conditions and trends, historical bad debt write-offs, customer creditworthiness, and changes in customer payment terms. We write off customer accounts receivable balances to the allowance for doubtful accounts when it becomes likely that we will not collect from the customer.
	In addition, our hosting arrangements contain service level commitments with our customers. To the extent that such service levels are not achieved or are otherwise disputed due to third-party power or service issues, unfavorable weather, or other service interruptions or conditions, we are required to issue service credits for a portion of the hosting service fees paid by our customers. At each reporting period, we estimate the amount of service level credits to be issued and record a reduction to revenue. To estimate service credits, we utilize historical data and known credits yet to be issued to our customers.
	Prepaid Expenses and Other Assets
	Prepaid expenses and other assets consist primarily of software and equipment maintenance contracts and prepaid operating expenses. Software maintenance contracts are amortized over the agreement period, generally one to three years. Prepaid operating expenses are expensed in the period in which services are received.
	Property and Equipment, Net
	Property and equipment is stated at cost, net of accumulated depreciation. Property and equipment is depreciated on a straight-line basis over the estimated useful life of the asset. Replacements and major improvements are capitalized, while maintenance and repairs are charged to expense as incurred. Upon retirement or sale, the cost of assets disposed of and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to operations.
	Goodwill and Intangible Assets
	Goodwill consists of the excess of the purchase price over the fair value of identifiable net assets of businesses acquired. Goodwill is evaluated for impairment at a reporting unit level using a fair value approach on an annual basis at the beginning of the fourth quarter or whenever events or circumstances indicate that impairment may have occurred. Our assessment did not utilize the qualitative assessment as we went directly to Step 1 of the test. No goodwill impairment was recognized in any of the years presented.
	Intangible assets, including purchased technology, customer contracts and relationships, certain tradenames, license agreements, and non-compete agreements arising principally from acquisitions, are recorded at cost less accumulated amortization, and the definite-lived intangibles are amortized using a method that reflects the pattern in which the economic benefits of the related intangible asset are consumed or utilized.
	Impairment of Long-Lived Assets
	Long-lived assets, including property and equipment and intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount should be evaluated. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset in conjunction with its asset group compared to the estimated undiscounted future cash flows expected to be generated by the asset group. If the carrying amount of the asset group exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset group exceeds the fair value of the assets.
	Leases
	We lease certain property and equipment under capital lease agreements. The assets held under capital lease and related obligations are recorded at the lesser of the present value of aggregate future minimum lease payments, including estimated bargain purchase options, or the fair value of the assets held under capital lease. Such assets and the related leasehold improvements are amortized over the shorter of the terms of the leases or the estimated useful lives of the assets, which typically range from two to five years for equipment and 30 years for property. For assets for which the lease agreement includes a bargain purchase option or transfer of ownership at the completion of the lease and the lease term is shorter than the estimated useful life of the asset, the asset is amortized over its estimated useful life.
	We also lease property and equipment under operating lease agreements. The lease terms typically range from two to five years for equipment and one to twenty years for property, including office space and data center facilities. Rent increases, rent holidays, leasehold incentives or any other unusual provisions or conditions are considered with total rent payments and are expensed on a straight-line basis over the lease period.
	Revenue and Deferred Revenue
	Revenue is reported net of customer credits and sales and use tax. We recognize revenue when persuasive evidence of an arrangement exists, service has been provided to the customer, the amount of fees to be paid by the customer is fixed or determinable, and collectibility is reasonably assured. We provide cloud computing services to our customers and generally do not sell hardware and software products. We recognize cloud computing revenue, including installation fees, beginning on the date the customer commences use of our services. Cloud computing revenue is recognized over the contractual term of the customer contract.
	Customers using our Dedicated Cloud services typically pay us a monthly recurring charge based upon the capacity and complexity of the IT systems we manage, the type of technology used and the level of support we provide. Some customers also pay a non-refundable installation fee. Since our Dedicated Cloud customers usually continue to utilize our services beyond the initial contract term, these installation fees are recognized ratably over the estimated average life of a customer relationship.
	Our Public Cloud services offers pay-as-you-go cloud computing services that are billed according to customer usage. Revenue is recognized in the month in which the customer uses the services.
	Invoiced amounts are recorded in accounts receivable and either deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. Therefore, deferred revenue primarily consists of amounts that have been prepaid or deferred installation fees. As of December 31, 2013, of the total $26.5 million in deferred revenue recorded on our balance sheet (the majority of which related to prepaid amounts), $22.9 million, $3.4 million, and $0.2 million will be amortized to revenue in 2014, 2015 and 2016, respectively.
	Cost of Revenue
	Cost of revenue consists primarily of expenses related to personnel, licenses, and our data center facilities. Personnel expenses include the salaries, non-equity incentive compensation, share-based compensation and related expenses of our support teams and data center employees, and data center facility costs include rental fees, power costs, maintenance fees, and bandwidth.
	Installation Costs
	Setup and other direct installation activities are performed at the inception of a specific arrangement with each customer to enable us to perform under the terms of the arrangement. These setup or installation costs are expensed as incurred.
	Advertising Costs
	We charge advertising costs to expense in the period incurred. Advertising expenses for the years ended December 31, 2011, 2012 and 2013 were approximately $37.8 million, $44.7 million and $58.9 million, respectively.
	Internally Developed Software
	We capitalize certain costs of computer software developed or acquired for internal use. Capitalized computer software costs consist of purchased software licenses, implementation costs, and salaries and related compensation costs of employees and consultants for certain projects that qualify for capitalization. The capitalized software costs are amortized on a straight-line basis over the expected useful life of the software, which is generally over periods extending to 36 months.
	Share-Based Compensation
	The Black-Scholes valuation model that we use to determine the fair value of share-based compensation requires us to make assumptions and judgments about variables related to our common stock and the related awards. These variables and assumptions include the fair value of our common stock, expected term, the expected volatility, the risk-free interest rate, expected dividends, and the estimated rate of forfeitures of unvested stock options.
	We used the following assumptions when determining the fair value of our stock options:
	•	Fair Value of our Common Stock—The end of day market price on the grant date is used to determine fair value.
	•	Expected Term—The expected term represents the period that our share-based awards are expected to be outstanding. In order to compute the expected term for the four-year period immediately following our IPO, we elected to use the simplified method due to insufficient historical exercise data available to provide a reasonable basis upon which to estimate the expected term. We have been a public company since August 2008, and our options generally vest over four years and expire seven to ten years from the grant date. Beginning in August 2012, management determined that sufficient historical data is available for a fair evaluation and therefore we began to use historical exercise data in our estimation of the expected term.
	•	Expected Volatility—Management estimates volatility for option grants by evaluating the weighted average of the implied volatility and the mean reversion volatility of the company’s stock.
•	Risk-Free Interest Rate—The risk-free interest rate used in the Black-Scholes valuation model is based on the implied yield currently available on U.S. Treasury zero-coupon issues with an equivalent expected term.
•	Expected Dividend—We have not issued dividends to date and do not anticipate issuing dividends.
•	Estimated Rate of Forfeitures—We estimate expected forfeitures based on our historical experience. If actual forfeitures differ from our estimates, we will record the difference as an adjustment in the period we revise our estimates.
We also grant restricted stock, a portion of which have vesting conditions dependent upon the financial performance of the company and/or the performance of the company’s total shareholder return (TSR) on its common stock compared to certain market indices. Additionally, the company’s TSR must be positive for vesting to occur. We use a Monte Carlo simulation to estimate the fair value of these awards. For all other restricted stock granted that vests ratably over the requisite service period, we measure fair value based on the closing fair market value of the company’s common stock on the date of grant, and we recognize expense straight-line over the vesting period.
Income Taxes
Income taxes are accounted for using the asset and liability method. Deferred income taxes are provided for temporary differences in recognizing certain income, expense, and credit items for financial reporting purposes and tax reporting purposes. Such deferred income taxes primarily relate to the difference between the tax bases of assets and liabilities and their financial reporting amounts. Deferred tax assets and liabilities are measured by applying enacted statutory tax rates applicable to the future years in which deferred tax assets or liabilities are expected to be settled or realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversals of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. Based upon projections of future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that we will realize the benefits of these deductible differences.
We are not currently under income tax audit in any jurisdiction in which we operate. However, due to the complexity involved with certain tax matters, there is the possibility that the various taxing authorities may disagree with certain tax positions filed on our income tax returns. We have considered all relevant facts and circumstances and believe that we have made adequate provision for all income tax uncertainties. For a further discussion of the impact of uncertain tax positions, see Note 13, "Taxes."
We do not provide for a U.S. income tax liability on undistributed earnings of our foreign subsidiaries. The earnings of non-U.S. subsidiaries, which reflect full provision for non-U.S. income taxes, are currently indefinitely reinvested in non-U.S. operations or will be remitted substantially free of additional tax.
Fair Value of Financial Instruments
The carrying values of certain financial instruments, including cash and cash equivalents, accounts receivables, accounts payable, and accrued expenses, approximate fair value because of the short-term nature of these items. The carrying value of our debt approximates the fair value as of December 31, 2012 and 2013.
Foreign Currency
We have assessed the functional currency of each of our international subsidiaries and have generally designated the local currency to be their respective functional currencies. The financial statements of these foreign subsidiaries are translated into the U.S. dollar. All assets and liabilities are translated to the U.S. dollar at the end-of-period exchange rates. Capital accounts are determined to be of a permanent nature and are therefore translated using historical exchange rates. Revenue and expenses are translated using average exchange rates.
Foreign currency translation adjustments arising from differences in exchange rates from period to period are included in the foreign currency translation adjustment account in accumulated comprehensive income (loss). The income tax expense allocated to foreign currency translation adjustments during the year ended December 31, 2011 was $0.1 million. There was no income tax expense allocated in the years ended December 31, 2012 and 2013.
Transaction gains or losses in currencies other than the functional currency are included as a component of other income (expense) in the consolidated statements of comprehensive income.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The following table sets forth the computation of basic and diluted earnings per share:
		Year Ended December 31,
	(In thousands except per share data)	2011		2012		2013
	Basic net income per share:
	Net income	$	76,411	$	105,418	$	86,737
	Weighted average shares outstanding:
	Common stock	129,922		135,279		138,577
	Number of shares used in per share computations	129,922		135,279		138,577
	Earnings per share	$	0.59	$	0.78	$	0.63
	Diluted net income per share:
	Net income	$	76,411	$	105,418	$	86,737
	Weighted average shares outstanding:
	Common stock	129,922		135,279		138,577
	Stock options, awards and employee share purchase plans	8,142		5,986		4,434
	Number of shares used in per share computations	138,064		141,265		143,011
	Earnings per share	$	0.55	$	0.75	$	0.61
	We excluded 1.2 million, 1.1 million and 3.5 million potential common shares from the computation of dilutive earnings per share for the years ended December 31, 2011, 2012 and 2013, respectively, because the effect would have been anti-dilutive.

Cash_and_Cash_Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]	'
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash and cash equivalents consisted of:
	(In thousands)	December 31,		December 31,
		2012		2013
	Cash deposits	$	131,271	$	157,353
	Money market funds	160,790		102,380
	Cash and cash equivalents	$	292,061	$	259,733
	Our available cash and cash equivalents are held in bank deposits, overnight sweep accounts, and money market funds. We actively monitor the third-party depository institutions that hold our deposits. Our emphasis is primarily on the safety of principal, secondly on the liquidity of our investments, and finally on maximizing yield on those funds.
	Our money market mutual funds comply with SEC Rule 2a-7 and invest exclusively in high-quality, short-term obligations that include securities issued or guaranteed by the U.S. government or by U.S. government agencies and floating rate and variable rate demand notes of U.S. and foreign corporations.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There is a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:
	Level 1 – Observable inputs such as quoted prices in active markets for identical assets or liabilities;
	Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and
	Level 3 – Unobservable inputs that are supported by little or no market activity, which require management judgment or estimation.
	Assets and liabilities measured at fair value on a recurring basis are summarized in the table below. As of December 31, 2012 and 2013, we did not hold any financial instruments categorized as Level 2 or Level 3. Our Level 1 assets and liabilities are valued using quoted market prices.
	(In thousands)		December 31,		December 31,
			2012		2013
	Level 1:
	Assets:
	Money market funds (1)		$	160,790	$	102,380
	Rabbi trust (2)		520		835
	Total		$	161,310	$	103,215
	Liabilities:
	Deferred compensation (3)		$	410	$	540
	Total		$	410	$	540
	-1	Money market funds are classified in cash and cash equivalents.
	-2	Investments in marketable securities held in a Rabbi Trust associated with a non-qualified deferred compensation plan are classified in other non-current assets.
	-3	Obligations to pay benefits under a non-qualified deferred compensation plan are classified in other non-current liabilities.
	Our Rabbi Trust was established in 2009, and we elected the fair value option, which allows for the recognition of gains and losses to be recorded in the Statement of Comprehensive Income in the same period as the gains and losses are incurred as part of the non-qualified deferred compensation plan. During 2011, 2012, and 2013, we recognized minimal net gains as interest and other income.

Property_and_Equipment_net

Property and Equipment, net	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property and Equipment, net	'
	Property and Equipment, net
	Property and equipment consisted of:
	(Dollar amounts in thousands)	Estimated Useful Lives				December 31,			December 31,
						2012			2013
	Computers, software and equipment	1	-	5	years	$	1,140,772		$	1,488,106
	Furniture and fixtures	7	years			40,557			55,681
	Buildings and leasehold improvements	2	-	30	years	214,858			236,255
	Land					15,864			28,566
	Property and equipment, at cost					1,412,051			1,808,608
	Less accumulated depreciation and amortization					(738,274		)	(983,618		)
	Work in process					51,208			65,786
	Property and equipment, net					$	724,985		$	890,776
	Depreciation and leasehold amortization expense, not including amortization expense for intangible assets, was $189.8 million, $240.9 million and $303.2 million for the years ended December 31, 2011, 2012 and 2013, respectively.
	At December 31, 2012, the work in process balance consisted of build outs of $28.4 million for office facilities, $2.8 million for data centers, and $20.0 million for capitalized software and other projects. At December 31, 2013, the work in process balance consisted of build outs of $32.6 million for office facilities, $2.4 million for data centers, and $30.7 million for capitalized software and other projects.
	The unamortized balance of computer software costs on our balance sheets was $78.7 million and $88.7 million as of December 31, 2012 and 2013, respectively. Amortization expense for capitalized computer software costs was $26.2 million, $36.4 million and $50.6 million for the years ended December 31, 2011, 2012 and 2013, respectively.

Business_Combinations_and_Good

Business Combinations and Goodwill	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Business Combinations and Goodwill	'
	Business Combinations and Goodwill
	During the year ended December 31, 2013, we acquired three companies for total consideration of $16.2 million, of which approximately $12.3 million was attributed to goodwill, $5.1 million to acquired intangible assets and $1.2 million to other net liabilities assumed. The acquisitions were accounted for using the acquisition method, and the purchase prices were allocated based on the estimated fair values of the individual assets acquired and liabilities assumed at the date of acquisition. The Consolidated Statements of Comprehensive Income include the results of operations for the acquired companies commencing on their respective acquisition dates. Pro forma results of operations for these acquisitions have not been presented because they are not material to the consolidated results of operations, either individually or in aggregate.
	The finite-lived intangible assets acquired as part of these acquisitions have a weighted-average useful life of 3.2 years.
	During the year ended December 31, 2012, we acquired two companies for total consideration of $10.9 million, including cash payments, deferred cash payments and equity consideration. Approximately $8.7 million was attributed to goodwill, $2.3 million to acquired intangible assets and $0.1 million to other net liabilities assumed.
	The following table provides a roll forward of our goodwill balance.
	(In thousands)
	December 31, 2011	$	59,993
	Acquisitions	8,749
	December 31, 2012	$	68,742
	Acquisitions	12,342
	December 31, 2013	$	81,084
	None of the goodwill recorded in 2013 is deductible for tax purposes.
	In prior periods, we acquired companies that required additional future payments in addition to the initial cash payment. During 2013, we paid $1.5 million related to these previous acquisitions, and as of December 31, 2013, the fair value of the remaining liability recorded was $0.5 million.

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'
Intangible Assets	'
	Intangible Assets
	The following tables provide information regarding our intangible assets, other than goodwill:
		December 31, 2012
	(In thousands)	Gross carrying amount		Accumulated amortization			Net carrying amount
	Intangible assets:
	Licenses	$	30,620	$	(16,826	)	$	13,794
	Purchased technologies	8,762		(5,062		)	3,700
	Domain name purchases	446		(441		)	5
	Non-compete agreements	1,900		(1,186		)	714
	Customer relationships	5,725		(4,477		)	1,248
	Trademarks, tradenames and patents	3,062		(1,671		)	1,391
	Other	4,040		(1,090		)	2,950
	Total	$	54,555	$	(30,753	)	$	23,802
		December 31, 2013
	(In thousands)	Gross carrying amount		Accumulated amortization			Net carrying amount
	Intangible assets:
	Licenses	$	31,443	$	(21,216	)	$	10,227
	Purchased technologies	13,180		(7,428		)	5,752
	Domain name purchases	442		(442		)	—
	Non-compete agreements	2,165		(1,613		)	552
	Customer relationships	6,137		(5,442		)	695
	Trademarks, tradenames and patents	3,581		(1,985		)	1,596
	Other	7,539		(2,481		)	5,058
	Total	$	64,487	$	(40,607	)	$	23,880
	Amortization expense on intangibles was $5.6 million, $8.9 million and $9.8 million in 2011, 2012 and 2013, respectively. Intangible assets are recorded at cost and are amortized on a straight-line basis over their estimated useful lives, which generally range from two to five years.
	As of December 31, 2013, amortization expense on intangible assets for the next five years was expected to be as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	9,408
	2015	8,504
	2016	4,970
	2017	536
	2018	293
	Thereafter	169
	Total	$	23,880
	As of December 31, 2013, there were no indicators that our intangible assets were impaired.

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	Revolving Credit Facility
	In 2011 we entered into a revolving credit facility with a syndicate of seven banks led by JPMorgan Chase. This facility, which matures in September 2016, has a total commitment of $200 million and is governed by financial and non-financial covenants, including a leverage ratio of not greater than 3.00 to 1.00, an interest coverage ratio of not less than 3.00 to 1.00, and a requirement to maintain a certain level of tangible assets in our U.S. entities. Our marginal borrowing costs on this facility are based on a floating base rate (LIBOR) plus a spread, which ranges from 1.25% to 2.00%, depending on our degree of financial leverage. We also pay a fee on the committed but unused amount of the facility, which ranges from 0.25% to 0.40%, also depending on our degree of financial leverage. The agreement further includes an accordion feature, which allows for an increase in the commitments to a total of $400 million under the same terms and conditions, subject to credit approval of the banking syndicate.
	Since entering into this credit facility, we have not had any borrowings outstanding except for letters of credit, which were insignificant at the end of 2013. Therefore, as of December 31, 2013, we had $200 million available for future borrowings. As of the same date, we were in compliance with all of the covenants under our facility.
	Notes Payable
	We have entered into various financing arrangements with equipment and software vendors. As of December 31, 2013, the total amount financed under these relationships was $2.0 million with various terms extending to July 2015 and stated interest rates ranging from 0.0% to 1.7%. For arrangements with below-market interest rates, we impute an interest charge based on our average borrowing rate. The weighted-average effective interest rate of the various arrangements with third-party vendors was 5.3% as of December 31, 2013.

Leases

Leases	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Leases	'
	Leases
	Capital Leases
	We have master lease agreements with our primary vendors that supply us with servers and computer equipment. Historically, we have financed most equipment purchases through their respective finance companies. The terms vary with each vendor but typically include a term of two to five years and interest rates ranging from 1% to 4%. A majority of these agreements allow us to purchase the equipment at the end of the lease for a nominal amount.
	Amounts in property and equipment under these capital leases consisted of:
	(In thousands)	December 31, 2012			December 31, 2013
	Computers, software and equipment	$	389,720		$	391,833
	Less: accumulated depreciation and amortization	(272,708		)	(335,599		)
		$	117,012		$	56,234
	Additionally, we have entered into some complex real estate development and lease arrangements with independent real estate developers to design, construct and lease certain real estate projects. While the independent developer legally owns the real estate projects and must finance the overall construction, we have funded certain structural improvements and/or retained obligations related to certain potential construction cost overruns which have triggered an accounting requirement to include construction costs in progress and a related long-term lease finance liability on our balance sheets as though we are the owner of the asset during the construction period. We have reported $6.8 million of costs incurred at December 31, 2013 as work in process and recorded a corresponding long-term lease finance liability. We do not depreciate the cost of the real estate projects or expect to fund this long-term lease finance liability during the construction period.
	Upon completion of construction, we will perform a sale-leaseback analysis pursuant to ASC 840, Leases, to determine if we can remove the asset and liability from our consolidated balance sheet. If the asset and corresponding liability can be derecognized, then the lease will be accounted for as an operating lease, and we will recognize rent expense over the lease term. However, certain factors may be considered “continuing involvement” which precludes derecognizing the asset and liability from the consolidated balance sheet when construction is complete. If the sale-leaseback criteria are not met, the asset would be considered to be owned for accounting purposes during the lease term. Accordingly, it would be depreciated and rental payments under the lease would be recorded as a reduction of the lease finance liability and interest expense.
	Future capital lease payments under non-cancelable leases as of December 31, 2013 were as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	39,221
	2015	17,448
	2016	2,242
	2017	622
	2018	635
	Thereafter	3,819
	Total minimum capital lease payments	63,987
	Less amount representing interest	(1,054		)
	Present value of net minimum lease payments	62,933
	Less current portion of obligations under capital leases	(37,885		)
	Non-current obligations under capital leases	$	25,048
	Operating Leases
	We lease our data center facilities and certain office space under non-cancelable operating lease agreements. Facility leases generally include renewal options and may require us to pay a portion of the related operating expenses. Certain of these lease agreements have escalating rental payment provisions. We recognize rent expense for such arrangements on a straight-line basis.
	Future operating lease payments under non-cancelable leases with an initial term in excess of one year as of December 31, 2013 were as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	67,160
	2015	69,306
	2016	65,124
	2017	64,944
	2018	60,172
	Thereafter	591,054
	Total minimum operating lease payments	$	917,760
	Rent expense for the years ended December 31, 2011, 2012 and 2013 was $34.1 million, $46.1 million and $66.0 million, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Purchase Commitments
	Non-cancelable purchase commitments primarily relate to costs associated with our data centers, including bandwidth and electricity, as well as commitments for consulting services and to purchase hardware and to prepay for certain software licenses. The agreements can generally extend up to five years and provide for either penalties for early termination or may require minimum commitments for the remaining term. The minimum commitments for all of these agreements as of December 31, 2013 approximated $50.5 million, $26.0 million, $1.0 million, $0.7 million and $0.2 million for the years ended December 31, 2014, 2015, 2016, 2017 and 2018, respectively.
	We also have purchase orders and construction contracts primarily related to data center equipment and facility build-outs. We generally have the right to cancel these open purchase orders prior to delivery or terminate the contracts without cause.
	Legal Proceedings
	We are party to various legal and administrative proceedings, which we consider routine and incidental to our business. Although the outcome of these matters is currently not determinable, management expects that any losses that are incurred as a result of these matters, which are in excess of amounts already accrued in its consolidated balance sheet, would not be material to the financial statements as a whole. In addition, we were involved in the following legal proceeding as of December 31, 2013:
	On October 22, 2008, Benjamin E. Rodriguez D/B/A Management and Business Advisors vs. Rackspace Hosting, Inc. and Graham Weston was filed in the 37th District Court in Bexar County, Texas by a former consultant to the company, Benjamin E. Rodriguez. The suit alleged breach of an oral agreement to issue Mr. Rodriguez a 1% interest in our stock in the form of options or warrants for compensation for services he was engaged to perform for us. This matter was settled as of February 19, 2014, and there was not a material difference between the settlement amount and the amount for which we had accrued for the matter in our consolidated financial statements.
	We are also a party to various claims that certain of our products, services, and technologies infringe the intellectual property rights of others. Adverse results in these lawsuits may include awards of substantial monetary damages, costly royalty or licensing agreements, or orders preventing us from offering certain features, products, or services, and may also cause us to change our business practices and require development of non-infringing products or technologies, which could result in a loss of revenue for us and otherwise harm our business. We have disputed the allegations of wrongdoing in these proceedings and intend to vigorously defend ourselves in all such matters.
	We cannot predict the impact, if any, that any of the matters described above may have on our business, results of operations, financial position, or cash flows. Because of the inherent uncertainties of such matters, including the early stage and lack of specific damage claims in many of them, we cannot estimate the range of possible losses from them.
	Indemnifications
	As permitted under Delaware law, we have agreements whereby we indemnify our officers and directors for certain events or occurrences while the officer or director is, or was, serving at our request in such capacity. The term of the indemnification period is for the officer’s or director’s lifetime. The maximum potential amount of future payments we could be required to make under these indemnification agreements is unlimited; however, we have a director and officer insurance policy that limits our exposure and enables us to recover a portion of any future amounts paid. As a result of the insurance policy coverage, we believe the estimated fair value of these indemnification agreements is minimal. We had no significant liabilities recorded for these agreements as of December 31, 2012 or 2013.
	Additionally, in the normal course of business, we indemnify certain parties, including customers, vendors and lessors, with respect to certain matters. We have agreed to hold certain parties harmless against losses arising from a breach of representations or covenants or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. We had no significant liabilities recorded for these agreements as of December 31, 2012 or 2013.
	Incentive Arrangements
	In August 2007, we entered into a lease for our corporate headquarters. In connection with this lease, we also entered into a Master Economic Incentives Agreement ("MEIA") with the Cities of Windcrest and San Antonio, Texas; Bexar County; and certain other parties, pursuant to which we agreed to locate existing and future employees at the new facility location. The agreement required that we meet certain employment levels each year in exchange for a 14-year exemption from most of the property taxes associated with the property. If we fail to meet these job creation requirements, we could lose a portion or all of the tax exemption provided during the 14-year period and would then be obligated to repay the exemption amount. We have met the requirements for the employment level for the year ended December 31, 2013, and we believe that it is probable that we will continue to meet the requirements throughout the exemption period. We elected to begin the exemption period in 2009.
	Further, we entered into an agreement with the State of Texas, under which we received $5.0 million in 2007 and $3.5 million in 2012 and may receive up to an additional $13.5 million from the Texas Enterprise Fund in multiple installments, provided that we meet certain new job levels in the State of Texas. We are responsible for maintaining the jobs until January 2022. If we eliminate jobs for which we have drawn funds, we are subject to a clawback on the amounts we have drawn plus 3.4% interest on such amounts per year. As of December 31, 2013, the $8.5 million received was deferred and recorded as other non-current liabilities. Amounts will be recognized into income upon the achievement of the performance criteria and the determination that the cash is no longer refundable to the State of Texas.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	Stockholders' Equity
	Common Stock
	At December 31, 2012 and 2013, we had 137,797,855 and 141,123,904 shares of our common stock legally issued and outstanding, respectively.
	We have one class of authorized common stock. The rights and privileges provided to our common stockholders are as follows:
	•Dividend Rights—Subject to preferences that may apply to shares of preferred stock outstanding at the time, the holders of our common stock are entitled to receive dividends, at the discretion of our board of directors.
	•Voting Rights—All holders of common stock are entitled to one vote per share on all matters to be voted on by Rackspace Hosting's stockholders.
	•Right to Receive Liquidation Distributions—Upon liquidation, dissolution or winding-up, the holders of our common stock are entitled to share equally in all of our assets remaining after payment of all liabilities and the liquidation preferences of any outstanding preferred stock.
	Preferred Stock
	As of December 31, 2012 and 2013, there were 50 million authorized shares of preferred stock, of which none was issued or outstanding.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation	'
	Share-Based Compensation
	In December 2007, we adopted our 2007 Long-Term Incentive Plan (the "2007 Stock Plan"). Under the 2007 Stock Plan, incentive and non-qualified stock options or rights to purchase common stock may be granted to eligible participants. In addition to stock options, we may grant other equity awards such as stock appreciation rights, restricted stock awards, restricted stock units, performance awards, cash-based awards, and dividend equivalents. All awards, excluding incentive stock options, may be granted under the plan to employees, officers, directors, or any other non-employee service provider to the company. Incentive stock options may be granted only to employees of the company or a subsidiary. The exercise price of a stock option granted under the 2007 Stock Plan will be determined by the Compensation Committee at the time the option is granted and generally may not be less than 100% of the fair market value of a share of common stock as of the date of grant. The 2007 Stock Plan had an automatic share reserve increase effective the first day of each fiscal year, from 2009 through 2012. For fiscal years 2011 and 2012, this resulted in an increase of approximately 5.8 million and 5.9 million shares, respectively, available under our Stock Plans.
	At our 2012 annual meeting of the stockholders, our stockholders approved certain amendments to the 2007 Stock Plan. The amendments included, among other things, setting a fixed number of shares available of 12 million, removing the evergreen provision and requiring new grants of restricted stock, restricted stock units, performance units and performance shares to count against the numerical limits of the 2007 Stock Plan as 1.76 shares for every one share that is subject to such an award.
	The following have been granted under our 2007 Stock Plan: stock options, restricted stock units (RSUs) and restricted stock awards (RSAs). Collectively, all such grants are referred to as "awards." All awards deduct one share from the 2007 Stock Plan shares available for issuance for each share granted, except as described above. To the extent awards granted under the 2007 Stock Plan terminate, expire or lapse, shares subject to such awards generally will again be available for future grant.
	In addition to the 2007 Stock Plan, we also maintain the 2003 Stock Plan, the 2005 Stock Plan and plans assumed through acquisitions, collectively referred to as the Stock Plans. Options are priced to be at least 100% of our common stock’s fair market value at the date of grant. Options have generally been granted for terms of either seven or ten years and generally vest ratably over a four-year period or cliff-vest at the third anniversary date of the grant.
	As of December 31, 2013, the total number of shares authorized, outstanding and available for future grants under the Stock Plans was as follows:
	Plan Name	Shares Authorized			Shares Outstanding			Shares
								Available for Future Grants
	Amended and Restated 2007 Long-Term Incentive Plan	28,789,197			12,016,730			5,760,151
	Other Stock Plans	14,252,015			1,009,111			—
	Total	43,041,212			13,025,841			5,760,151
	The composition of the equity awards outstanding as of December 31, 2012 and 2013 was as follows:
		December 31,		December 31,
		2012		2013
	Restricted stock	2,800,230		3,538,271
	Stock options	9,032,512		9,487,570
	Total outstanding awards	11,832,742		13,025,841
	Restricted Stock
	The following table summarizes our RSU and RSA activity for the year ended December 31, 2013:
		Number of Units or Shares		Weighted-Average Grant-Date Fair Value
	Outstanding at December 31, 2012	2,800,230		$	25.57
	Granted	1,542,948		$	39.24
	Released	-588,550		$	35.43
	Cancelled	-216,357		$	42.23
	Outstanding at December 31, 2013	3,538,271		$	28.79
	Expected to vest after December 31, 2013*	3,106,300		$	29.78
	*Includes reduction of shares outstanding due to estimated forfeitures
	The weighted-average grant-date fair value of RSUs and RSAs granted during 2011 and 2012 was $36.22 and $51.78, respectively. The total pre-tax intrinsic value of the RSUs and RSAs released during 2011, 2012 and 2013 was $7.7 million, $75.5 million and $29.7 million, respectively.
	In February 2009, our board approved grants of RSUs to our former chief executive officer and another member of the executive team. A total of 2,000,000 RSUs were granted. The vesting of these RSUs is dependent on the company’s total shareholder return (TSR) on its common stock compared to other companies in the Russell 2000 Index. In addition, the company’s TSR must be positive for vesting to occur. Of the total RSUs granted, 1,050,000 had a measurement period at the end of three years. The Company's TSR was compared to the Russell 2000 Index in February 2012, and it was determined that the required market results were met. The remaining 950,000 RSUs have a measurement period at the end of five years. The grant-date fair value of these awards was $7.0 million and is being amortized over the awards’ service periods. The fair value was calculated using a Monte Carlo pricing model.
	In 2013, we granted 1,542,948 RSUs, of which 1,206,144 vest as the employee continues to be employed with us, in four equal installments, on each of the first, second, third and fourth anniversaries of the grant date. The fair value of these service-vesting awards is measured based on the closing fair market value of our common stock on the date of grant, and share-based compensation expense is recognized ratably over the four-year service period. The remaining 336,804 awards were granted to members of our executive team. The vesting of these awards is dependent upon predetermined market results over the next three years. The fair values of these market-vesting awards were measured using a Monte Carlo simulation based on the date of grant, and share-based compensation expense is recognized ratably over the three-year vesting period.
	Stock Options
	The following table summarizes the stock option activity for the year ended December 31, 2013:
		Number of Shares		Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Life	Aggregate Intrinsic Value (in thousands)
	Outstanding at December 31, 2012	9,032,512		$	21.11			5.27	$	480,191
	Granted	3,128,561		$	43.95
	Exercised	-2,125,859		$	8.29
	Cancelled	-547,644		$	40.98
	Outstanding at December 31, 2013	9,487,570		$	30.37			5.1	$	117,886
	Vested and exercisable at December 31, 2013	4,423,014		$	15.64			4.21	$	109,170
	Vested and exercisable at December 31, 2013 and expected to vest thereafter*	8,646,666		$	28.98			5	$	117,319
	*Includes reduction of shares outstanding due to estimated forfeitures
	The stock options granted in 2011, 2012 and 2013 vest as the employee continues to be employed with us, in four equal installments, on each of the first, second, third and fourth anniversaries of the grant date and have a term of seven years.
	The total pre-tax intrinsic value of the stock options exercised during 2011, 2012 and 2013 was $149.2 million, $193.1 million and $76.4 million, respectively.
	The following table presents the assumptions used to estimate the fair values of the stock options granted in the periods presented:
		Years Ended December 31,
		2011		2012		2013
	Expected stock volatility	56% - 57%		56% - 58%		46% - 47%
	Expected dividend yield	—%		—%		—%
	Risk-free interest rate	0.85% - 2.35%		0.50% - 0.77%		0.57% - 0.93%
	Expected life	4.75 years		4.00 - 4.75 years		3.79 years
	Weighted-average grant-date fair value of options granted during the year	$18.09		$24.38		$15.86
	Employee Stock Purchase Plan
	An Employee Stock Purchase Plan (the "ESPP") for U.S. employees was approved by the Company's Board of Directors in 2011 and adopted by the Company on January 1, 2012. Under the ESPP, eligible employees may purchase a limited number of shares of the Company's common stock at the lesser of 85% of the market value on the enrollment date or 85% of the market value on the purchase date. The ESPP is made up of a series of offering periods. Each offering period has a maximum term of 24 months and is divided into semi-annual purchase intervals. Eligible employees may enroll at the beginning of any semi-annual purchase interval.
	The fair value on each enrollment date was determined using the Black-Scholes option-pricing model. The following table presents the assumptions used to estimate the fair values of the shares granted through the ESPP in the periods presented:
		Years Ended December 31,
		2012		2013
	Expected stock volatility	41% - 53%		32% - 62%
	Expected dividend yield	—%		—%
	Risk-free interest rate	0.06% - 0.27%		0.09% - 0.34%
	Expected life	0.5 - 2.0 years		0.5 - 2.0 years
	Weighted-average grant-date fair value of shares granted during the year	$14.98		$16.04
	Other
	During the year ended December 31, 2013, we issued an aggregate total of 348,925 restricted shares of our common stock in connection with acquisitions. The restrictions release over a required service period of three to four years as defined in each respective Stock Repurchase Agreement. The issuance of these shares of common stock was made in reliance on the exemption from registration provided by Section 4(2) of the Securities Act of 1933. We measure the fair value of restricted shares issued based on the closing fair market value of the company’s common stock on the date of issuance. We recognize the expense straight-line over the service period.
Share-Based Compensation Expense
Share-based compensation expense was recognized as follows:
	Year Ended December 31,
(in thousands)	2011				2012			2013
Cost of revenue	$	7,482			$	9,592		$	12,584
Research and development	2,975				4,856			8,168
Sales and marketing	2,408				6,379			7,317
General and administrative	15,908				20,719			31,576
Pre-tax share-based compensation	28,773				41,546			59,645
Less: Income tax benefit	(9,890		)		(15,477		)	(20,080		)
Total share-based compensation expense, net of tax	$	18,883			$	26,069		$	39,565
The Company has made certain reclassifications to the prior year amounts above in order to conform to the current year's presentation. Refer to Note 1, "Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies," for more information about these reclassifications.
As of December 31, 2013, there was $173.0 million of total unrecognized compensation cost related to restricted stock, options and the ESPP, which will be amortized using the straight-line method over a weighted-average period of 2.3 years.

Taxes

Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Taxes	'
	Taxes
	The provision for income taxes consisted of:
		Year Ended December 31,
	(In thousands)	2011				2012				2013
	Current:
	Federal	$	18,372			$	38,720			$	35,912
	Foreign	14,976				19,248				12,071
	State	4,011				4,296				4,121
	Total current	37,359				62,264				52,104
	Deferred:
	Federal	4,345				1,359				(3,886		)
	Foreign	(877		)		(910		)		(1,621		)
	State	(809		)		(124		)		(2,575		)
	Total deferred	2,659				325				(8,082		)
	Total provision for income taxes	$	40,018			$	62,589			$	44,022
	Income before income taxes included income from foreign operations of approximately $51.7 million, $61.6 million and $39.7 million for the years ended December 31, 2011, 2012 and 2013, respectively.
	A reconciliation of the statutory federal tax rate to the effective tax rate is as follows:
		Year Ended December 31,
		2011			2012			2013
	Statutory federal tax rate	35	%		35	%		35	%
	State taxes, net of federal benefit	1.9	%		1.5	%		0.7	%
	Tax rate differentials for international jurisdictions	-4.1	%		-2	%		-3.8	%
	Permanent differences	1.8	%		2.5	%		1.3	%
	Other, net	-0.2	%		0.3	%		0.5	%
	Effective tax rate	34.4	%		37.3	%		33.7	%
	Deferred Taxes
	Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes. Significant components of our deferred tax assets and liabilities are as follows:
	(In thousands)	December 31, 2012				December 31, 2013
	Deferred tax assets:
	Share-based compensation	$	17,703			$	23,487
	Accounts receivable	1,232				1,275
	State income taxes	590				2,293
	Vacation accruals	4,033				5,235
	Deferred revenue	3,815				3,793
	Deferred rent	10,477				13,736
	Accruals not currently deductible	7,212				7,850
	Net operating loss carryforwards	5,697				3,534
	Charitable contribution carryforward	782				754
	Foreign tax credit	1,583				1,723
	Research and development credits	3,401				13,871
	Other	(348		)		1,674
	Total gross deferred tax assets	56,177				79,225
	Deferred tax liabilities:
	Depreciation	108,208				125,209
	Share-based compensation	821				107
	Prepaids	2,593				2,981
	Total gross deferred tax liabilities	111,622				128,297
	Net deferred tax assets (liabilities)	$	(55,445	)		$	(49,072	)
	Realization of deferred tax assets is dependent upon future earnings, if any, the timing and amount of which are uncertain. A valuation allowance was not established or deemed necessary based upon the determination that future profits are anticipated to utilize deferred tax assets in the future.
	The company has not recognized a deferred tax liability for undistributed earnings of its foreign subsidiaries because such earnings are considered indefinitely invested in a foreign country. As of December 31, 2013, undistributed earnings of the company’s foreign subsidiaries considered indefinitely invested were approximately $175.5 million. We intend to reinvest these earnings in active non-U.S. business operations and do not currently intend to repatriate these earnings to fund U.S. operations through either a dividend, liquidation or other means. Further, it is expected that the undistributed earnings of the company's foreign subsidiaries will be used to fund the additional investments made outside of the U.S. The determination of the amount of unrecognized deferred tax liability related to undistributed earnings is not practicable because of the complexities of the hypothetical calculation.
	We have $250.8 million of federal net operating loss carryforwards and $15.6 million of federal tax credit carryforwards expiring at various dates through 2033. The entire balance of federal net operating loss carryforwards is due to gross excess tax benefits from stock option exercises that have not been recorded as of December 31, 2013. We have $21.4 million of foreign net operating loss carryforwards, which have an indefinite expiration date.
	Uncertain Tax Positions
	We file income tax returns in each jurisdiction in which we operate, both domestically and internationally. Due to the complexity involved with certain tax matters, we have considered all relevant facts and circumstances for the financial statement recognition, measurement, presentation and disclosure of uncertain tax positions taken or expected to be taken in income tax returns. We believe that there are no other jurisdictions in which the outcome of uncertain tax matters is likely to be material to our results of operations, financial position or cash flows. We further believe that we have made adequate provision for all income tax uncertainties.
	A reconciliation of our unrecognized tax benefits, excluding accrued interest, for 2012 and 2013 is as follows:
	(In thousands)	2012				2013
	Balance, beginning of year	$	16,729			$	18,664
	Additions based on tax positions related to the current year	1,946				3,919
	Additions for tax positions of prior years	—				663
	Reductions for tax positions of prior years	(11		)		—
	Balance, end of year	$	18,664			$	23,246
	Unrecognized tax benefits of $18.7 million and $23.2 million for 2012 and 2013, respectively, are included in other non-current liabilities on the balance sheet. At December 31, 2012 and 2013, respectively, approximately $3.3 million and $8.2 million of these unrecognized tax benefits, if recognized, would favorably impact our effective tax rate in any future period. Also included in the balance of unrecognized tax benefits at December 31, 2013 are liabilities of $15.1 million that, if recognized, would be recorded as an adjustment to other current and non-current assets. We do not expect the amount of unrecognized tax benefits disclosed above to change significantly over the next 12 months.
	We recognize interest expense and penalties related to income tax matters within other income (expense) on our consolidated statements of comprehensive income and not as income tax expense, when applicable. As of December 31, 2012 and 2013, we had no accrued interest or penalties on the consolidated balance sheets. For the years ended December 31, 2011, 2012 and 2013, no amount for interest or penalties related to unrecognized tax benefits was recorded in the consolidated statements of comprehensive income.
	We are subject to U.S. federal income tax and various state, local, and international income taxes in numerous jurisdictions. Our domestic and international tax liabilities are subject to the allocation of revenue and expenses in different jurisdictions and the timing of recognizing revenue and expenses. As such, our effective tax rate is impacted by the geographical distribution of income and mix of profits in the various jurisdictions. Additionally, the amount of income taxes paid is subject to our interpretation of applicable tax laws in the jurisdictions in which we file.
We currently file income tax returns in the U.S. and all foreign jurisdictions in which we have entities, which are periodically under audit by federal, state, and international tax authorities. These audits can involve complex matters that may require an extended period of time for resolution. We remain subject to U.S. federal and state income tax examinations for the tax years 2009 through 2013 and in the international jurisdictions in which we operate for varying periods from 2007 through 2013. There are no income tax examinations currently in process. Although the outcome of open tax audits is uncertain, in management’s opinion, adequate provisions for income taxes have been made. If actual outcomes differ materially from these estimates, they could have a material impact on our financial condition and results of operations. Differences between actual results and assumptions or changes in assumptions in future periods are recorded in the period they become known. To the extent additional information becomes available prior to resolution, such accruals are adjusted to reflect probable outcomes.
During 2013 we did not receive any federal income tax refunds. We experienced taxable profits in the U.S. and U.K. in 2013 before consideration of excess tax benefits, and therefore we anticipate utilizing benefits of tax deductions related to stock compensation. As a result, we have recognized an excess tax benefit in the U.S. and U.K.
During 2011, 2012 and 2013, Rackspace US, Inc. sold certain intangible assets to a wholly-owned offshore subsidiary in taxable transactions. As a result of the transactions, there is an asset on the consolidated balance sheet as of December 31, 2013 of $38.4 million (of which $34.8 million was recorded in other non-current assets) that will be amortized through income tax expense over the lives of the applicable intangible assets. Although the transactions were taxable, the resulting gains were entirely offset against existing net operating losses, including excess stock compensation deductions. Thus, there was no cash tax impact from the sales of the intangible assets.
In January 2013, the American Taxpayer Relief Act of 2012 was signed into law. The accounting for income taxes for 2013 included the impact of certain retroactive legislation, such as the Federal tax credit for research and development, as well as the impact of certain extended business provisions, such as bonus depreciation.
At the time of this filing, the provisions for the Federal tax credit and bonus depreciation amongst others have not been extended. If these provisions or other legislation is passed, it will be reflected in the 2014 financial statements in the period of enactment. Given our investments in developing new technologies for our business, the expiration of the Federal tax credit for research and development is expected to result in an increase to our effective tax rate in 2014.

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	We operate as one reportable segment based upon the financial information that our chief executive officer, who is the chief operating decision maker, regularly reviews to decide how to allocate resources and assess performance. We periodically review and align our internal reporting structure as our product and service offerings and our customer base expand in reach and presence to ensure our organization effectively serves the diverse and evolving Cloud Computing market. Since we operate in one reportable segment, all relevant financial information used to allocate resources and assess performance can be found in the consolidated financial statements.
	Revenue is attributed to geographic location based on the Rackspace operating location that enters into the contractual relationship with the customer, either the U.S. or International, primarily the U.K. Total net revenue by geographic region was as follows:
		Year Ended December 31,
	(In thousands)	2011		2012		2013
	United States	$	767,752	$	973,733	$	1,133,645
	International	257,312		335,506		401,141
	Total net revenue	$	1,025,064	$	1,309,239	$	1,534,786
	In the future, we will attribute revenue to geographic location based on the customer's billing address, either the U.S. or International, primarily the U.K. While the geographic information is not significantly different from the current method, we believe the customer billing address is the best indicator of customer location. Due to system limitations, we have determined that it is impracticable to restate the 2011 and 2012 revenue information on this basis. Total net revenue by geographic region in 2013 based upon the customer's billing address was as follows:
		Year Ended December 31,
	(In thousands)	2013
	United States	$	1,076,248
	International	458,538
	Total net revenue	$	1,534,786
	Total net revenue by our product categories was as follows:
		Year Ended December 31,
		2011		2012		2013
	Dedicated Cloud	$	835,877	$	1,005,165	$	1,119,636
	Public Cloud	189,187		304,074		415,150
	Total net revenue	$	1,025,064	$	1,309,239	$	1,534,786
	Our long-lived assets are primarily located in the U.S. and the U.K., and to a lesser extent Hong Kong and Australia. Property and equipment, net by geographic region was as follows:
	(In thousands)	December 31,		December 31,
		2012		2013
	United States	$	534,275	$	654,507
	International	190,710		236,269
	Total property and equipment, net	$	724,985	$	890,776

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	We sponsor a defined contribution retirement plan ("the Plan") for our U.S. employees, which has been determined by the IRS to qualify as a 401(k) plan. The Plan provides for voluntary tax-deferred contributions of up to 100% of gross compensation, subject to certain IRS limitations. The Plan also includes an employer contribution. During 2011, 2012 and 2013, contribution expense recognized for our U.S. plan was $3.9 million, $4.8 million and $6.5 million, respectively.
	We also sponsor non-mandatory defined contribution plans for our international employees. Pursuant to these plans, we contribute a certain percentage of the employee’s salary. During 2011, 2012 and 2013, contribution expense recognized for our international plans was $1.9 million, $2.6 million and $3.8 million, respectively.

Schedule_of_Valuation_and_Qual

Schedule of Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Schedule of Valuation and Qualifying Accounts Disclosure	'
	Financial Statement Schedules
	The following financial statement schedule is filed as a part of this Annual Report:
	•Schedule II - Valuation and Qualifying Accounts
	All other schedules are omitted because they are not required or the required information is shown in the financial statements or notes thereto.
	(In thousands)	Beginning Balance		Additions Charged to Net Revenues and Costs and Expenses		Write-offs of Accounts Receivable and Credit Memos Paid			Ending Balance
	Allowance for doubtful accounts and customer credits for the years ending December 31:
	2011	$	2,846	$	9,063	$	(8,489	)	$	3,420
	2012	$	3,420	$	9,411	$	(8,595	)	$	4,236
	2013	$	4,236	$	8,167	$	(8,512	)	$	3,891

Supplementary_Financial_Data_U

Supplementary Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Supplementary Financial Data (Unaudited)	'
	SUPPLEMENTARY FINANCIAL DATA
	(UNAUDITED)
		Quarters Ended
	(In thousands, except per share amounts)	March 31,		June 30,		September 30,		December 31,
		2012		2012		2012		2012
	Net revenue	$	301,355	$	318,990	$	335,985	$	352,909
	Cost of revenue	$	100,081	$	102,572	$	107,348	$	109,012
	Gross profit	$	201,274	$	216,418	$	228,637	$	243,897
	Net income	$	23,180	$	25,134	$	27,197	$	29,907
	Earnings per share - basic	$	0.17	$	0.19	$	0.2	$	0.22
	Earnings per share - diluted	$	0.17	$	0.18	$	0.19	$	0.21
	Cash and cash equivalents	$	186,531	$	215,448	$	257,651	$	292,061
		Quarters Ended
	(In thousands, except per share amounts)	March 31,		June 30,		September 30,		December 31,
		2013		2013		2013		2013
	Net revenue	$	362,200	$	375,847	$	388,636	$	408,103
	Cost of revenue	$	113,610	$	117,658	$	127,404	$	133,821
	Gross profit	$	248,590	$	258,189	$	261,232	$	274,282
	Net income	$	27,261	$	22,367	$	16,311	$	20,798
	Earnings per share - basic	$	0.2	$	0.16	$	0.12	$	0.15
	Earnings per share - diluted	$	0.19	$	0.16	$	0.11	$	0.14
	Cash and cash equivalents	$	278,627	$	263,052	$	269,995	$	259,733
	Certain reclassifications have been made to prior year amounts in order to conform to the current year's presentation. Refer to Note 1, "Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies," for more information about these reclassifications.

Summary_of_Significant_Account

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Consolidation	'
	The consolidated financial statements include the accounts of Rackspace Hosting and our wholly-owned subsidiaries, which include, among others, Rackspace US, Inc., our domestic operating entity, and Rackspace Limited, our United Kingdom operating entity. Intercompany transactions and balances have been eliminated in consolidation.
Reclassifications	'
	Certain reclassifications have been made to prior year balances in order to conform to the current year’s presentation. These include reclassifications within the Consolidated Statements of Comprehensive Income that we believe provide greater transparency and clarity about our costs and expenses.
Use of Estimates	'
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States ("GAAP") requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, we evaluate our estimates, including those related to accounts receivable and customer credits, property and equipment, fair values of intangible assets and goodwill, useful lives of intangible assets, fair value of share-based compensation, contingencies, and income taxes, among others. Whenever possible, we base our estimates and assumptions on historical experience. However, certain estimates require us to make assumptions about expected future cash flow, events and usage patterns that we cannot influence or control. Our judgments, assumptions and estimates are based upon facts and circumstances known to us when we prepare the financial statements and that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities or recording revenue and expenses in our financial statements. Changes in facts and circumstances may cause us to change our assumptions and estimates in future periods, and it is possible that actual results could differ from our estimates. We engaged third-party consultants to assist management in the valuation of acquired assets, including other intangibles, as well as share-based compensation.
Concentrations of Risk, Credit Risk	'
	Financial instruments, which could potentially subject us to concentrations of credit risk, consist principally of cash and cash equivalents and accounts receivable. We place our cash and cash equivalents in money market accounts with high credit quality financial institutions; however, the balance may exceed applicable insurance limits or may not be insured. While we monitor the balances in our accounts and adjust these balances as appropriate, they could be impacted if the underlying depository institutions fail or could be subject to other adverse conditions in the financial markets. To date, we have experienced no material loss or lack of access to our invested cash and cash equivalents; however, we can provide no assurances that access to our funds will not be impacted by adverse conditions in the financial markets.
	We perform ongoing credit evaluations, and collateral is generally not required for trade receivables.
Cash and Cash Equivalents	'
	For the purposes of the consolidated financial statements, we consider all highly liquid investments with original maturities of three months or less when acquired to be cash equivalents. Our available cash and cash equivalents are held in bank deposits, overnight sweep accounts, and money market funds. Gains and losses are included in interest and other income in our accompanying consolidated statements of comprehensive income.
Accounts Receivable, Net	'
	We classify as trade accounts receivable amounts due within twelve months, arising from the provision of services in the normal course of business. We assess collectibility based on a number of factors, including customer payment history and creditworthiness. We generally do not request collateral from our customers, although in certain cases we may require the customer to prepay for services. When evaluating the adequacy of allowances, we analyze accounts receivable, current economic conditions and trends, historical bad debt write-offs, customer creditworthiness, and changes in customer payment terms. We write off customer accounts receivable balances to the allowance for doubtful accounts when it becomes likely that we will not collect from the customer.
	In addition, our hosting arrangements contain service level commitments with our customers. To the extent that such service levels are not achieved or are otherwise disputed due to third-party power or service issues, unfavorable weather, or other service interruptions or conditions, we are required to issue service credits for a portion of the hosting service fees paid by our customers. At each reporting period, we estimate the amount of service level credits to be issued and record a reduction to revenue. To estimate service credits, we utilize historical data and known credits yet to be issued to our customers.
Prepaid Expense and Other Assets	'
	Prepaid expenses and other assets consist primarily of software and equipment maintenance contracts and prepaid operating expenses. Software maintenance contracts are amortized over the agreement period, generally one to three years. Prepaid operating expenses are expensed in the period in which services are received.
Property and Equipment, Net	'
	Property and equipment is stated at cost, net of accumulated depreciation. Property and equipment is depreciated on a straight-line basis over the estimated useful life of the asset. Replacements and major improvements are capitalized, while maintenance and repairs are charged to expense as incurred. Upon retirement or sale, the cost of assets disposed of and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to operations.
Goodwill and Intangible Assets	'
	Goodwill consists of the excess of the purchase price over the fair value of identifiable net assets of businesses acquired. Goodwill is evaluated for impairment at a reporting unit level using a fair value approach on an annual basis at the beginning of the fourth quarter or whenever events or circumstances indicate that impairment may have occurred. Our assessment did not utilize the qualitative assessment as we went directly to Step 1 of the test. No goodwill impairment was recognized in any of the years presented.
	Intangible assets, including purchased technology, customer contracts and relationships, certain tradenames, license agreements, and non-compete agreements arising principally from acquisitions, are recorded at cost less accumulated amortization, and the definite-lived intangibles are amortized using a method that reflects the pattern in which the economic benefits of the related intangible asset are consumed or utilized.
Impairment of Long-Lived Assets	'
	Long-lived assets, including property and equipment and intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount should be evaluated. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset in conjunction with its asset group compared to the estimated undiscounted future cash flows expected to be generated by the asset group. If the carrying amount of the asset group exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset group exceeds the fair value of the assets.
Leases	'
	We lease certain property and equipment under capital lease agreements. The assets held under capital lease and related obligations are recorded at the lesser of the present value of aggregate future minimum lease payments, including estimated bargain purchase options, or the fair value of the assets held under capital lease. Such assets and the related leasehold improvements are amortized over the shorter of the terms of the leases or the estimated useful lives of the assets, which typically range from two to five years for equipment and 30 years for property. For assets for which the lease agreement includes a bargain purchase option or transfer of ownership at the completion of the lease and the lease term is shorter than the estimated useful life of the asset, the asset is amortized over its estimated useful life.
	We also lease property and equipment under operating lease agreements. The lease terms typically range from two to five years for equipment and one to twenty years for property, including office space and data center facilities. Rent increases, rent holidays, leasehold incentives or any other unusual provisions or conditions are considered with total rent payments and are expensed on a straight-line basis over the lease period.
Revenue and Deferred Revenue	'
	Revenue is reported net of customer credits and sales and use tax. We recognize revenue when persuasive evidence of an arrangement exists, service has been provided to the customer, the amount of fees to be paid by the customer is fixed or determinable, and collectibility is reasonably assured. We provide cloud computing services to our customers and generally do not sell hardware and software products. We recognize cloud computing revenue, including installation fees, beginning on the date the customer commences use of our services. Cloud computing revenue is recognized over the contractual term of the customer contract.
	Customers using our Dedicated Cloud services typically pay us a monthly recurring charge based upon the capacity and complexity of the IT systems we manage, the type of technology used and the level of support we provide. Some customers also pay a non-refundable installation fee. Since our Dedicated Cloud customers usually continue to utilize our services beyond the initial contract term, these installation fees are recognized ratably over the estimated average life of a customer relationship.
	Our Public Cloud services offers pay-as-you-go cloud computing services that are billed according to customer usage. Revenue is recognized in the month in which the customer uses the services.
	Invoiced amounts are recorded in accounts receivable and either deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. Therefore, deferred revenue primarily consists of amounts that have been prepaid or deferred installation fees.
Cost of Revenue	'
	Cost of revenue consists primarily of expenses related to personnel, licenses, and our data center facilities. Personnel expenses include the salaries, non-equity incentive compensation, share-based compensation and related expenses of our support teams and data center employees, and data center facility costs include rental fees, power costs, maintenance fees, and bandwidth.
Installation Costs	'
	Setup and other direct installation activities are performed at the inception of a specific arrangement with each customer to enable us to perform under the terms of the arrangement. These setup or installation costs are expensed as incurred.
Advertising Costs	'
	We charge advertising costs to expense in the period incurred.
Internally Developed Software	'
	We capitalize certain costs of computer software developed or acquired for internal use. Capitalized computer software costs consist of purchased software licenses, implementation costs, and salaries and related compensation costs of employees and consultants for certain projects that qualify for capitalization. The capitalized software costs are amortized on a straight-line basis over the expected useful life of the software, which is generally over periods extending to 36 months.
Share-Based Compensation	'
	The Black-Scholes valuation model that we use to determine the fair value of share-based compensation requires us to make assumptions and judgments about variables related to our common stock and the related awards. These variables and assumptions include the fair value of our common stock, expected term, the expected volatility, the risk-free interest rate, expected dividends, and the estimated rate of forfeitures of unvested stock options.
	We used the following assumptions when determining the fair value of our stock options:
	•	Fair Value of our Common Stock—The end of day market price on the grant date is used to determine fair value.
	•	Expected Term—The expected term represents the period that our share-based awards are expected to be outstanding. In order to compute the expected term for the four-year period immediately following our IPO, we elected to use the simplified method due to insufficient historical exercise data available to provide a reasonable basis upon which to estimate the expected term. We have been a public company since August 2008, and our options generally vest over four years and expire seven to ten years from the grant date. Beginning in August 2012, management determined that sufficient historical data is available for a fair evaluation and therefore we began to use historical exercise data in our estimation of the expected term.
	•	Expected Volatility—Management estimates volatility for option grants by evaluating the weighted average of the implied volatility and the mean reversion volatility of the company’s stock.
	•	Risk-Free Interest Rate—The risk-free interest rate used in the Black-Scholes valuation model is based on the implied yield currently available on U.S. Treasury zero-coupon issues with an equivalent expected term.
	•	Expected Dividend—We have not issued dividends to date and do not anticipate issuing dividends.
	•	Estimated Rate of Forfeitures—We estimate expected forfeitures based on our historical experience. If actual forfeitures differ from our estimates, we will record the difference as an adjustment in the period we revise our estimates.
	We also grant restricted stock, a portion of which have vesting conditions dependent upon the financial performance of the company and/or the performance of the company’s total shareholder return (TSR) on its common stock compared to certain market indices. Additionally, the company’s TSR must be positive for vesting to occur. We use a Monte Carlo simulation to estimate the fair value of these awards. For all other restricted stock granted that vests ratably over the requisite service period, we measure fair value based on the closing fair market value of the company’s common stock on the date of grant, and we recognize expense straight-line over the vesting period.
Income Taxes	'
	Income taxes are accounted for using the asset and liability method. Deferred income taxes are provided for temporary differences in recognizing certain income, expense, and credit items for financial reporting purposes and tax reporting purposes. Such deferred income taxes primarily relate to the difference between the tax bases of assets and liabilities and their financial reporting amounts. Deferred tax assets and liabilities are measured by applying enacted statutory tax rates applicable to the future years in which deferred tax assets or liabilities are expected to be settled or realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversals of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. Based upon projections of future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that we will realize the benefits of these deductible differences.
Income Tax Uncertainties	'
	We are not currently under income tax audit in any jurisdiction in which we operate. However, due to the complexity involved with certain tax matters, there is the possibility that the various taxing authorities may disagree with certain tax positions filed on our income tax returns. We have considered all relevant facts and circumstances and believe that we have made adequate provision for all income tax uncertainties.
Undistributed Earnings of Foreign Subsidiaries	'
	We do not provide for a U.S. income tax liability on undistributed earnings of our foreign subsidiaries. The earnings of non-U.S. subsidiaries, which reflect full provision for non-U.S. income taxes, are currently indefinitely reinvested in non-U.S. operations or will be remitted substantially free of additional tax.
Fair Value of Financial Instruments	'
	The carrying values of certain financial instruments, including cash and cash equivalents, accounts receivables, accounts payable, and accrued expenses, approximate fair value because of the short-term nature of these items. The carrying value of our debt approximates the fair value as of December 31, 2012 and 2013.
Foreign Currency	'
	We have assessed the functional currency of each of our international subsidiaries and have generally designated the local currency to be their respective functional currencies. The financial statements of these foreign subsidiaries are translated into the U.S. dollar. All assets and liabilities are translated to the U.S. dollar at the end-of-period exchange rates. Capital accounts are determined to be of a permanent nature and are therefore translated using historical exchange rates. Revenue and expenses are translated using average exchange rates.
	Foreign currency translation adjustments arising from differences in exchange rates from period to period are included in the foreign currency translation adjustment account in accumulated comprehensive income (loss). The income tax expense allocated to foreign currency translation adjustments during the year ended December 31, 2011 was $0.1 million. There was no income tax expense allocated in the years ended December 31, 2012 and 2013.
	Transaction gains or losses in currencies other than the functional currency are included as a component of other income (expense) in the consolidated statements of comprehensive income.
Business Combinations	'
	The acquisitions were accounted for using the acquisition method, and the purchase prices were allocated based on the estimated fair values of the individual assets acquired and liabilities assumed at the date of acquisition.
Segment Reporting	'
	We operate as one reportable segment based upon the financial information that our chief executive officer, who is the chief operating decision maker, regularly reviews to decide how to allocate resources and assess performance. We periodically review and align our internal reporting structure as our product and service offerings and our customer base expand in reach and presence to ensure our organization effectively serves the diverse and evolving Cloud Computing market.

Company_Overview_Basis_of_Pres1

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies [Abstract]	'
Prior Year Reclassification Adjustments	'
	The table below summarizes the amount by which each category in the Consolidated Statement of Comprehensive Income increased/(decreased) for each period:
		Year Ended December 31,
	(In thousands)	2011			2012
	Cost of revenue	$	37,246		$	51,534
	Research and development	$	33,709		$	56,736
	Sales and marketing	$	4,669		$	8,064
	General and administrative	$	(75,624	)	$	(116,334	)

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings Per Share	'
	The following table sets forth the computation of basic and diluted earnings per share:
		Year Ended December 31,
	(In thousands except per share data)	2011		2012		2013
	Basic net income per share:
	Net income	$	76,411	$	105,418	$	86,737
	Weighted average shares outstanding:
	Common stock	129,922		135,279		138,577
	Number of shares used in per share computations	129,922		135,279		138,577
	Earnings per share	$	0.59	$	0.78	$	0.63
	Diluted net income per share:
	Net income	$	76,411	$	105,418	$	86,737
	Weighted average shares outstanding:
	Common stock	129,922		135,279		138,577
	Stock options, awards and employee share purchase plans	8,142		5,986		4,434
	Number of shares used in per share computations	138,064		141,265		143,011
	Earnings per share	$	0.55	$	0.75	$	0.61

Cash_and_Cash_Equivalents_Tabl

Cash and Cash Equivalents (Tables)	12 Months Ended
	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]	'
Schedule of Cash and Cash Equivalents	'
	Cash and cash equivalents consisted of:
	(In thousands)	December 31,		December 31,
		2012		2013
	Cash deposits	$	131,271	$	157,353
	Money market funds	160,790		102,380
	Cash and cash equivalents	$	292,061	$	259,733

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	Assets and liabilities measured at fair value on a recurring basis are summarized in the table below. As of December 31, 2012 and 2013, we did not hold any financial instruments categorized as Level 2 or Level 3. Our Level 1 assets and liabilities are valued using quoted market prices.
	(In thousands)		December 31,		December 31,
			2012		2013
	Level 1:
	Assets:
	Money market funds (1)		$	160,790	$	102,380
	Rabbi trust (2)		520		835
	Total		$	161,310	$	103,215
	Liabilities:
	Deferred compensation (3)		$	410	$	540
	Total		$	410	$	540
	-1	Money market funds are classified in cash and cash equivalents.
	-2	Investments in marketable securities held in a Rabbi Trust associated with a non-qualified deferred compensation plan are classified in other non-current assets.
	-3	Obligations to pay benefits under a non-qualified deferred compensation plan are classified in other non-current liabilities.

Property_and_Equipment_net_Tab

Property and Equipment, net (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property and Equipment	'
	Property and equipment consisted of:
	(Dollar amounts in thousands)	Estimated Useful Lives				December 31,			December 31,
						2012			2013
	Computers, software and equipment	1	-	5	years	$	1,140,772		$	1,488,106
	Furniture and fixtures	7	years			40,557			55,681
	Buildings and leasehold improvements	2	-	30	years	214,858			236,255
	Land					15,864			28,566
	Property and equipment, at cost					1,412,051			1,808,608
	Less accumulated depreciation and amortization					(738,274		)	(983,618		)
	Work in process					51,208			65,786
	Property and equipment, net					$	724,985		$	890,776

Business_Combinations_and_Good1

Business Combinations and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Roll Forward of Goodwill Balance	'
	The following table provides a roll forward of our goodwill balance.
	(In thousands)
	December 31, 2011	$	59,993
	Acquisitions	8,749
	December 31, 2012	$	68,742
	Acquisitions	12,342
	December 31, 2013	$	81,084

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'
Schedule of Intangible Assets, Other Than Goodwill	'
	The following tables provide information regarding our intangible assets, other than goodwill:
		December 31, 2012
	(In thousands)	Gross carrying amount		Accumulated amortization			Net carrying amount
	Intangible assets:
	Licenses	$	30,620	$	(16,826	)	$	13,794
	Purchased technologies	8,762		(5,062		)	3,700
	Domain name purchases	446		(441		)	5
	Non-compete agreements	1,900		(1,186		)	714
	Customer relationships	5,725		(4,477		)	1,248
	Trademarks, tradenames and patents	3,062		(1,671		)	1,391
	Other	4,040		(1,090		)	2,950
	Total	$	54,555	$	(30,753	)	$	23,802
		December 31, 2013
	(In thousands)	Gross carrying amount		Accumulated amortization			Net carrying amount
	Intangible assets:
	Licenses	$	31,443	$	(21,216	)	$	10,227
	Purchased technologies	13,180		(7,428		)	5,752
	Domain name purchases	442		(442		)	—
	Non-compete agreements	2,165		(1,613		)	552
	Customer relationships	6,137		(5,442		)	695
	Trademarks, tradenames and patents	3,581		(1,985		)	1,596
	Other	7,539		(2,481		)	5,058
	Total	$	64,487	$	(40,607	)	$	23,880
Schedule of Future Amortization Expense on Intangible Assets	'
	As of December 31, 2013, amortization expense on intangible assets for the next five years was expected to be as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	9,408
	2015	8,504
	2016	4,970
	2017	536
	2018	293
	Thereafter	169
	Total	$	23,880

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Property and equipment under capital leases	'
	Amounts in property and equipment under these capital leases consisted of:
	(In thousands)	December 31, 2012			December 31, 2013
	Computers, software and equipment	$	389,720		$	391,833
	Less: accumulated depreciation and amortization	(272,708		)	(335,599		)
		$	117,012		$	56,234
Future capital lease payments under non-cancelable leases	'
	Future capital lease payments under non-cancelable leases as of December 31, 2013 were as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	39,221
	2015	17,448
	2016	2,242
	2017	622
	2018	635
	Thereafter	3,819
	Total minimum capital lease payments	63,987
	Less amount representing interest	(1,054		)
	Present value of net minimum lease payments	62,933
	Less current portion of obligations under capital leases	(37,885		)
	Non-current obligations under capital leases	$	25,048
Future operating lease payments under non-cacelable leases	'
	Future operating lease payments under non-cancelable leases with an initial term in excess of one year as of December 31, 2013 were as follows:
	(In thousands)
	Year ending:	Amount
	2014	$	67,160
	2015	69,306
	2016	65,124
	2017	64,944
	2018	60,172
	Thereafter	591,054
	Total minimum operating lease payments	$	917,760

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Total number of shares authorized, outstanding and available for future grants under the Stock Plans	'
	As of December 31, 2013, the total number of shares authorized, outstanding and available for future grants under the Stock Plans was as follows:
	Plan Name	Shares Authorized			Shares Outstanding			Shares
								Available for Future Grants
	Amended and Restated 2007 Long-Term Incentive Plan	28,789,197			12,016,730			5,760,151
	Other Stock Plans	14,252,015			1,009,111			—
	Total	43,041,212			13,025,841			5,760,151
Composition of equity awards outstanding	'
	The composition of the equity awards outstanding as of December 31, 2012 and 2013 was as follows:
		December 31,		December 31,
		2012		2013
	Restricted stock	2,800,230		3,538,271
	Stock options	9,032,512		9,487,570
	Total outstanding awards	11,832,742		13,025,841
Restricted Stock Unit (RSU) and Restricted Stock Award (RSA) activity	'
	The following table summarizes our RSU and RSA activity for the year ended December 31, 2013:
		Number of Units or Shares		Weighted-Average Grant-Date Fair Value
	Outstanding at December 31, 2012	2,800,230		$	25.57
	Granted	1,542,948		$	39.24
	Released	-588,550		$	35.43
	Cancelled	-216,357		$	42.23
	Outstanding at December 31, 2013	3,538,271		$	28.79
	Expected to vest after December 31, 2013*	3,106,300		$	29.78
	*Includes reduction of shares outstanding due to estimated forfeitures
Stock option activity	'
	The following table summarizes the stock option activity for the year ended December 31, 2013:
		Number of Shares		Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Life	Aggregate Intrinsic Value (in thousands)
	Outstanding at December 31, 2012	9,032,512		$	21.11			5.27	$	480,191
	Granted	3,128,561		$	43.95
	Exercised	-2,125,859		$	8.29
	Cancelled	-547,644		$	40.98
	Outstanding at December 31, 2013	9,487,570		$	30.37			5.1	$	117,886
	Vested and exercisable at December 31, 2013	4,423,014		$	15.64			4.21	$	109,170
	Vested and exercisable at December 31, 2013 and expected to vest thereafter*	8,646,666		$	28.98			5	$	117,319
	*Includes reduction of shares outstanding due to estimated forfeitures
Assumptions used to estimate the fair values of the stock options granted	'
	The following table presents the assumptions used to estimate the fair values of the stock options granted in the periods presented:
		Years Ended December 31,
		2011		2012		2013
	Expected stock volatility	56% - 57%		56% - 58%		46% - 47%
	Expected dividend yield	—%		—%		—%
	Risk-free interest rate	0.85% - 2.35%		0.50% - 0.77%		0.57% - 0.93%
	Expected life	4.75 years		4.00 - 4.75 years		3.79 years
	Weighted-average grant-date fair value of options granted during the year	$18.09		$24.38		$15.86
Assumptions used to estimate the fair values of the shares granted through the Employee Stock Purchase Program (ESPP)	'
	The following table presents the assumptions used to estimate the fair values of the shares granted through the ESPP in the periods presented:
		Years Ended December 31,
		2012		2013
	Expected stock volatility	41% - 53%		32% - 62%
	Expected dividend yield	—%		—%
	Risk-free interest rate	0.06% - 0.27%		0.09% - 0.34%
	Expected life	0.5 - 2.0 years		0.5 - 2.0 years
	Weighted-average grant-date fair value of shares granted during the year	$14.98		$16.04
Allocation of share-based compensation expense to income statement line items	'
	Share-based compensation expense was recognized as follows:
		Year Ended December 31,
	(in thousands)	2011				2012			2013
	Cost of revenue	$	7,482			$	9,592		$	12,584
	Research and development	2,975				4,856			8,168
	Sales and marketing	2,408				6,379			7,317
	General and administrative	15,908				20,719			31,576
	Pre-tax share-based compensation	28,773				41,546			59,645
	Less: Income tax benefit	(9,890		)		(15,477		)	(20,080		)
	Total share-based compensation expense, net of tax	$	18,883			$	26,069		$	39,565
	The Company has made certain reclassifications to the prior year amounts above in order to conform to the current year's presentation. Refer to Note 1, "Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies," for more information about these reclassifications.

Taxes_Tables

Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Provision for Income Taxes	'
	The provision for income taxes consisted of:
		Year Ended December 31,
	(In thousands)	2011				2012				2013
	Current:
	Federal	$	18,372			$	38,720			$	35,912
	Foreign	14,976				19,248				12,071
	State	4,011				4,296				4,121
	Total current	37,359				62,264				52,104
	Deferred:
	Federal	4,345				1,359				(3,886		)
	Foreign	(877		)		(910		)		(1,621		)
	State	(809		)		(124		)		(2,575		)
	Total deferred	2,659				325				(8,082		)
	Total provision for income taxes	$	40,018			$	62,589			$	44,022
Reconciliation of Statutory Federal Tax Rate to Effective Tax Rate	'
	A reconciliation of the statutory federal tax rate to the effective tax rate is as follows:
		Year Ended December 31,
		2011			2012			2013
	Statutory federal tax rate	35	%		35	%		35	%
	State taxes, net of federal benefit	1.9	%		1.5	%		0.7	%
	Tax rate differentials for international jurisdictions	-4.1	%		-2	%		-3.8	%
	Permanent differences	1.8	%		2.5	%		1.3	%
	Other, net	-0.2	%		0.3	%		0.5	%
	Effective tax rate	34.4	%		37.3	%		33.7	%
Significant Components of Deferred Tax Assets and Liabilities	'
	Significant components of our deferred tax assets and liabilities are as follows:
	(In thousands)	December 31, 2012				December 31, 2013
	Deferred tax assets:
	Share-based compensation	$	17,703			$	23,487
	Accounts receivable	1,232				1,275
	State income taxes	590				2,293
	Vacation accruals	4,033				5,235
	Deferred revenue	3,815				3,793
	Deferred rent	10,477				13,736
	Accruals not currently deductible	7,212				7,850
	Net operating loss carryforwards	5,697				3,534
	Charitable contribution carryforward	782				754
	Foreign tax credit	1,583				1,723
	Research and development credits	3,401				13,871
	Other	(348		)		1,674
	Total gross deferred tax assets	56,177				79,225
	Deferred tax liabilities:
	Depreciation	108,208				125,209
	Share-based compensation	821				107
	Prepaids	2,593				2,981
	Total gross deferred tax liabilities	111,622				128,297
	Net deferred tax assets (liabilities)	$	(55,445	)		$	(49,072	)
Reconciliation of Unrecognized Tax Benefits, Excluding Accrued Interest	'
	A reconciliation of our unrecognized tax benefits, excluding accrued interest, for 2012 and 2013 is as follows:
	(In thousands)	2012				2013
	Balance, beginning of year	$	16,729			$	18,664
	Additions based on tax positions related to the current year	1,946				3,919
	Additions for tax positions of prior years	—				663
	Reductions for tax positions of prior years	(11		)		—
	Balance, end of year	$	18,664			$	23,246

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Total net revenue by geographic region, attributed based on operating location that enters into contractual relationship with customer	'
	Revenue is attributed to geographic location based on the Rackspace operating location that enters into the contractual relationship with the customer, either the U.S. or International, primarily the U.K. Total net revenue by geographic region was as follows:
		Year Ended December 31,
	(In thousands)	2011		2012		2013
	United States	$	767,752	$	973,733	$	1,133,645
	International	257,312		335,506		401,141
	Total net revenue	$	1,025,064	$	1,309,239	$	1,534,786
Total net revenue by geographic region, attributed based on customer's billing address	'
	Total net revenue by geographic region in 2013 based upon the customer's billing address was as follows:
		Year Ended December 31,
	(In thousands)	2013
	United States	$	1,076,248
	International	458,538
	Total net revenue	$	1,534,786
Total net revenue by product categories	'
	Total net revenue by our product categories was as follows:
		Year Ended December 31,
		2011		2012		2013
	Dedicated Cloud	$	835,877	$	1,005,165	$	1,119,636
	Public Cloud	189,187		304,074		415,150
	Total net revenue	$	1,025,064	$	1,309,239	$	1,534,786
Property and equipment, net by geographic region	'
	Our long-lived assets are primarily located in the U.S. and the U.K., and to a lesser extent Hong Kong and Australia. Property and equipment, net by geographic region was as follows:
	(In thousands)	December 31,		December 31,
		2012		2013
	United States	$	534,275	$	654,507
	International	190,710		236,269
	Total property and equipment, net	$	724,985	$	890,776

Supplementary_Financial_Data_U1

Supplementary Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Supplementary Financial Data	'
		Quarters Ended
	(In thousands, except per share amounts)	March 31,		June 30,		September 30,		December 31,
		2012		2012		2012		2012
	Net revenue	$	301,355	$	318,990	$	335,985	$	352,909
	Cost of revenue	$	100,081	$	102,572	$	107,348	$	109,012
	Gross profit	$	201,274	$	216,418	$	228,637	$	243,897
	Net income	$	23,180	$	25,134	$	27,197	$	29,907
	Earnings per share - basic	$	0.17	$	0.19	$	0.2	$	0.22
	Earnings per share - diluted	$	0.17	$	0.18	$	0.19	$	0.21
	Cash and cash equivalents	$	186,531	$	215,448	$	257,651	$	292,061
		Quarters Ended
	(In thousands, except per share amounts)	March 31,		June 30,		September 30,		December 31,
		2013		2013		2013		2013
	Net revenue	$	362,200	$	375,847	$	388,636	$	408,103
	Cost of revenue	$	113,610	$	117,658	$	127,404	$	133,821
	Gross profit	$	248,590	$	258,189	$	261,232	$	274,282
	Net income	$	27,261	$	22,367	$	16,311	$	20,798
	Earnings per share - basic	$	0.2	$	0.16	$	0.12	$	0.15
	Earnings per share - diluted	$	0.19	$	0.16	$	0.11	$	0.14
	Cash and cash equivalents	$	278,627	$	263,052	$	269,995	$	259,733

Company_Overview_Basis_of_Pres2

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Details 1) - Basis of Presentation (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Cost of revenue	'	'
Amount by which each category in Consolidated Statement of Comprehensive Income increased/(decreased)	$51,534	$37,246
Research and development	'	'
Amount by which each category in Consolidated Statement of Comprehensive Income increased/(decreased)	56,736	33,709
Sales and marketing	'	'
Amount by which each category in Consolidated Statement of Comprehensive Income increased/(decreased)	8,064	4,669
General and administrative	'	'
Amount by which each category in Consolidated Statement of Comprehensive Income increased/(decreased)	($116,334)	($75,624)

Company_Overview_Basis_of_Pres3

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Details 2) - Concentrations of Risk (Maximum, Credit Concentration Risk, Total Accounts Receivable)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Maximum | Credit Concentration Risk | Total Accounts Receivable	'	'
Concentrations of Risk	'	'
Credit concentration risk as a percentage of total accounts receivable	10.00%	10.00%

Company_Overview_Basis_of_Pres4

Company Overview, Basis of Presentation, and Summary of Significant Accounting Policies (Details 3) - Significant Accounting Policies (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets	'	'	'
Goodwill impairment recognized	$0	$0	$0
Revenue and Deferred Revenue	'	'	'
Deferred revenue, total	26,500,000	'	'
Deferred revenue, current portion	22,868,000	17,265,000	'
Deferred revenue, non-current portion	3,662,000	3,695,000	'
Advertising Costs	'	'	'
Advertising expenses	58,900,000	44,700,000	37,800,000
Foreign Currency	'	'	'
Income tax expense allocated to foreign currency translation adjustments	0	0	100,000
Minimum	'	'	'
Prepaid Expenses and Other Assets	'	'	'
Agreement period of software maintenance contracts	'1 year	'	'
Maximum	'	'	'
Prepaid Expenses and Other Assets	'	'	'
Agreement period of software maintenance contracts	'3 years	'	'
Stock Options	'	'	'
Share-Based Compensation	'	'	'
Stock options vesting period	'4 years	'	'
Stock options expiration period	'7 years	'7 years	'7 years
Stock Options | Minimum	'	'	'
Share-Based Compensation	'	'	'
Stock options expiration period	'7 years	'	'
Stock Options | Maximum	'	'	'
Share-Based Compensation	'	'	'
Stock options expiration period	'10 years	'	'
Deferred revenue to be amortized to revenue in 2014	'	'	'
Revenue and Deferred Revenue	'	'	'
Deferred revenue, current portion	22,900,000	'	'
Deferred revenue to be amortized to revenue in 2015	'	'	'
Revenue and Deferred Revenue	'	'	'
Deferred revenue, non-current portion	3,400,000	'	'
Deferred revenue to be amortized to revenue in 2016	'	'	'
Revenue and Deferred Revenue	'	'	'
Deferred revenue, non-current portion	$200,000	'	'
Equipment | Minimum	'	'	'
Leases and Internally Developed Software	'	'	'
Operating lease terms	'2 years	'	'
Equipment | Maximum	'	'	'
Leases and Internally Developed Software	'	'	'
Operating lease terms	'5 years	'	'
Property | Minimum	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'2 years	'	'
Operating lease terms	'1 year	'	'
Property | Maximum	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'30 years	'	'
Operating lease terms	'20 years	'	'
Software	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'36 months	'	'
Assets held under capital leases | Equipment | Minimum	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'2 years	'	'
Assets held under capital leases | Equipment | Maximum	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'5 years	'	'
Assets held under capital leases | Property	'	'	'
Leases and Internally Developed Software	'	'	'
Estimated useful lives of assets	'30 years	'	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic net income per share:	'	'	'	'	'	'	'	'	'	'	'
Net income	$20,798	$16,311	$22,367	$27,261	$29,907	$27,197	$25,134	$23,180	$86,737	$105,418	$76,411
Weighted average shares outstanding:	'	'	'	'	'	'	'	'	'	'	'
Common stock	'	'	'	'	'	'	'	'	138,577,000	135,279,000	129,922,000
Number of shares used in per share computations	'	'	'	'	'	'	'	'	138,577,000	135,279,000	129,922,000
Earnings per share	$0.15	$0.12	$0.16	$0.20	$0.22	$0.20	$0.19	$0.17	$0.63	$0.78	$0.59
Diluted net income per share:	'	'	'	'	'	'	'	'	'	'	'
Net income	$20,798	$16,311	$22,367	$27,261	$29,907	$27,197	$25,134	$23,180	$86,737	$105,418	$76,411
Weighted average shares outstanding:	'	'	'	'	'	'	'	'	'	'	'
Common stock	'	'	'	'	'	'	'	'	138,577,000	135,279,000	129,922,000
Stock options, awards and employee share purchase plans	'	'	'	'	'	'	'	'	4,434,000	5,986,000	8,142,000
Number of shares used in per share computations	'	'	'	'	'	'	'	'	143,011,000	141,265,000	138,064,000
Earnings per share	$0.14	$0.11	$0.16	$0.19	$0.21	$0.19	$0.18	$0.17	$0.61	$0.75	$0.55
Number of potential common shares excluded from the computation of dilutive earnings per share because the effect would have been anti-dilutive	'	'	'	'	'	'	'	'	3,500,000	1,100,000	1,200,000

Cash_and_Cash_Equivalents_Deta

Cash and Cash Equivalents (Details) (USD $)	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Cash and Cash Equivalents [Abstract]	'	'	'	'	'	'	'	'	'	'
Cash deposits	$157,353	'	'	'	$131,271	'	'	'	'	'
Money market funds	102,380	'	'	'	160,790	'	'	'	'	'
Cash and cash equivalents	$259,733	$269,995	$263,052	$278,627	$292,061	$257,651	$215,448	$186,531	$159,856	$104,941

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Assets:	'		'
Money market funds	$102,380		$160,790
Recurring Basis | Level 1	'		'
Assets:	'		'
Money market funds	102,380	[1]	160,790	[1]
Rabbi trust	835	[2]	520	[2]
Total	103,215		161,310
Liabilities:	'		'
Deferred compensation	540	[3]	410	[3]
Total	$540		$410
[1]	Money market funds are classified in cash and cash equivalents.
[2]	Investments in marketable securities held in a Rabbi Trust associated with a non-qualified deferred compensation plan are classified in other non-current assets.
[3]	Obligations to pay benefits under a non-qualified deferred compensation plan are classified in other non-current liabilities.

Property_and_Equipment_net_Det

Property and Equipment, net (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property and equipment	'	'	'
Property and equipment, at cost	$1,808,608,000	$1,412,051,000	'
Less accumulated depreciation and amortization	-983,618,000	-738,274,000	'
Work in process	65,786,000	51,208,000	'
Total property and equipment, net	890,776,000	724,985,000	'
Income statement disclosures	'	'	'
Depreciation and leasehold amortization expense	303,200,000	240,900,000	189,800,000
Computers, software and equipment	'	'	'
Property and equipment	'	'	'
Property and equipment, at cost	1,488,106,000	1,140,772,000	'
Computers, software and equipment | Minimum	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'1 year	'	'
Computers, software and equipment | Maximum	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'5 years	'	'
Furniture and fixtures	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'7 years	'	'
Property and equipment, at cost	55,681,000	40,557,000	'
Buildings and leasehold improvements	'	'	'
Property and equipment	'	'	'
Property and equipment, at cost	236,255,000	214,858,000	'
Buildings and leasehold improvements | Minimum	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'2 years	'	'
Buildings and leasehold improvements | Maximum	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'30 years	'	'
Land	'	'	'
Property and equipment	'	'	'
Property and equipment, at cost	28,566,000	15,864,000	'
Office facility build outs	'	'	'
Property and equipment	'	'	'
Work in process	32,600,000	28,400,000	'
Data center build outs	'	'	'
Property and equipment	'	'	'
Work in process	2,400,000	2,800,000	'
Capitalized computer software costs	'	'	'
Property and equipment	'	'	'
Estimated useful lives	'36 months	'	'
Work in process	30,700,000	20,000,000	'
Total property and equipment, net	88,700,000	78,700,000	'
Income statement disclosures	'	'	'
Depreciation and leasehold amortization expense	$50,600,000	$36,400,000	$26,200,000

Business_Combinations_and_Good2

Business Combinations and Goodwill (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	companies	companies
Business Combinations	'	'
Number of companies acquired	3	2
Total consideration transferred for businesses acquired	$16,200,000	$10,900,000
Purchase Price Allocation	'	'
Amount of purchase price allocated to goodwill	12,342,000	8,749,000
Amount of purchase price allocated to acquired intangible assets	5,100,000	2,300,000
Amount of purchase price allocated to other net liabilities assumed	1,200,000	100,000
Goodwill Roll Forward	'	'
Goodwill, beginning balance	68,742,000	59,993,000
Acquisitions	12,342,000	8,749,000
Goodwill, ending balance	81,084,000	68,742,000
Companies Acquired in Current Period	'	'
Business Combinations	'	'
Weighted-average useful life of finite-lived intangible assets acquired as part of acquisitions	'3 years 2 months	'
Goodwill	'	'
Goodwill deductible for tax purposes	0	'
Companies Acquired in Previous Periods	'	'
Business Combinations	'	'
Payments made during period related to previous acquisitions	1,500,000	'
Fair value of remaining liability to former owners of acquirees at year-end	$500,000	'

Intangible_Assets_Details_1_In

Intangible Assets (Details 1) - Intangible Assets, Other Than Goodwill (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	$64,487,000	$54,555,000	'
Accumulated amortization	-40,607,000	-30,753,000	'
Net carrying amount	23,880,000	23,802,000	'
Amortization expense	'	'	'
Amortization expense on intangibles	9,800,000	8,900,000	5,600,000
Minimum	'	'	'
Intangible assets, other than goodwill	'	'	'
Estimated useful lives of intangible assets	'2 years	'	'
Maximum	'	'	'
Intangible assets, other than goodwill	'	'	'
Estimated useful lives of intangible assets	'5 years	'	'
Licenses	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	31,443,000	30,620,000	'
Accumulated amortization	-21,216,000	-16,826,000	'
Net carrying amount	10,227,000	13,794,000	'
Purchased technologies	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	13,180,000	8,762,000	'
Accumulated amortization	-7,428,000	-5,062,000	'
Net carrying amount	5,752,000	3,700,000	'
Domain name purchases	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	442,000	446,000	'
Accumulated amortization	-442,000	-441,000	'
Net carrying amount	0	5,000	'
Non-compete agreements	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	2,165,000	1,900,000	'
Accumulated amortization	-1,613,000	-1,186,000	'
Net carrying amount	552,000	714,000	'
Customer relationships	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	6,137,000	5,725,000	'
Accumulated amortization	-5,442,000	-4,477,000	'
Net carrying amount	695,000	1,248,000	'
Trademarks, tradenames and patents	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	3,581,000	3,062,000	'
Accumulated amortization	-1,985,000	-1,671,000	'
Net carrying amount	1,596,000	1,391,000	'
Other	'	'	'
Intangible assets, other than goodwill	'	'	'
Gross carrying amount	7,539,000	4,040,000	'
Accumulated amortization	-2,481,000	-1,090,000	'
Net carrying amount	$5,058,000	$2,950,000	'

Intangible_Assets_Details_2_Fu

Intangible Assets (Details 2) - Future Amortization Expense on Intangible Assets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortization expense on intangible assets for the next five years	'	'
2014	$9,408	'
2015	8,504	'
2016	4,970	'
2017	536	'
2018	293	'
Thereafter	169	'
Net carrying amount	$23,880	$23,802

Debt_Details_1_Revolving_Credi

Debt (Details 1) - Revolving Credit Facility (Revolving Credit Facility, Bank Syndicate, led by JPMorgan Chase, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011
Revolving Credit Facility	'	'
Maturity date	'	30-Sep-16
Total commitment	'	$200,000,000
Maximum leverage ratio	'	3
Minimum interest coverage ratio	'	3
Floating base rate used to calculate marginal borrowing costs	'	'LIBOR
Total commitment allowed under accordion feature	'	400,000,000
Borrowings outstanding except for letters of credit	0	'
Available for future borrowings	$200,000,000	'
Status of compliance with covenants under facility	'in compliance	'
Minimum	'	'
Revolving Credit Facility	'	'
Spread added to floating base rate	'	1.25%
Fee percentage on committed but unused amount of facility	'	0.25%
Maximum	'	'
Revolving Credit Facility	'	'
Spread added to floating base rate	'	2.00%
Fee percentage on committed but unused amount of facility	'	0.40%

Debt_Details_2_Notes_Payable

Debt (Details 2) - Notes Payable (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Notes Payable	'
Total amount financed under arrangements with vendors	2
Notes Payable, Vendors	'
Notes Payable	'
Latest date the outstanding notes are required to be repaid	31-Jul-15
Minimum stated interest rate	0.00%
Maximum stated interest rate	1.70%
Weighted-average effective interest rate	5.30%

Leases_Details_1_Capital_Lease

Leases (Details 1) - Capital Leases, Financing Terms (Capital Leases)	12 Months Ended
	Dec. 31, 2013
Minimum	'
Capital Leases	'
Typical term	'2 years
Interest rates	1.00%
Maximum	'
Capital Leases	'
Typical term	'5 years
Interest rates	4.00%

Leases_Details_2_Capital_Lease

Leases (Details 2) - Capital Leases, Leased Assets and Future Lease Payments (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Future capital lease payments under non-cancelable leases	'	'
2014	$39,221	'
2015	17,448	'
2016	2,242	'
2017	622	'
2018	635	'
Thereafter	3,819	'
Total minimum capital lease payments	63,987	'
Less amount representing interest	-1,054	'
Present value of net minimum lease payments	62,933	'
Less current portion of obligations under capital leases	-37,885	-61,302
Non-current obligations under capital leases	25,048	60,335
Computers, software and equipment	'	'
Amounts in property and equipment under capital leases	'	'
Capital leased assets, gross	391,833	389,720
Less: Accumulated depreciation and amortization	-335,599	-272,708
Capital leased assets, net	56,234	117,012
Work in process	'	'
Amounts in property and equipment under capital leases	'	'
Capital leased assets, gross	$6,800	'

Leases_Details_3_Operating_Lea

Leases (Details 3) - Operating Leases (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Future operating lease payments under non-cancelable leases	'	'	'
2014	$67,160,000	'	'
2015	69,306,000	'	'
2016	65,124,000	'	'
2017	64,944,000	'	'
2018	60,172,000	'	'
Thereafter	591,054,000	'	'
Total minimum operating lease payments	917,760,000	'	'
Rent expense	'	'	'
Rent expense	$66,000,000	$46,100,000	$34,100,000

Commitments_and_Contingencies_

Commitments and Contingencies (Details 1) - Purchase Commitments (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Purchase Commitments	'
Maximum duration of non-cancelable purchase agreements	'5 years
Minimum purchase commitments for the year ended December 31, 2014	$50.50
Minimum purchase commitments for the year ended December 31, 2015	26
Minimum purchase commitments for the year ended December 31, 2016	1
Minimum purchase commitments for the year ended December 31, 2017	0.7
Minimum purchase commitments for the year ended December 31, 2018	$0.20

Commitments_and_Contingencies_1

Commitments and Contingencies (Details 2) - Legal Proceedings (Plaintiff - Benjamin E. Rodriguez, Settled Litigation)	0 Months Ended
	Feb. 19, 2014	Oct. 22, 2008
Plaintiff - Benjamin E. Rodriguez | Settled Litigation	'	'
Legal Proceedings	'	'
Lawsuit Filing Date	'	'October 22, 2008
Name of Plaintiff	'	'Benjamin E. Rodriguez D/B/A Management and Business Advisors
Name of Defendant	'	'Rackspace Hosting, Inc. and Graham Weston
Domicile of Litigation	'	'37th District Court in Bexar County, Texas
Allegations	'	'breach of an oral agreement to issue Mr. Rodriguez a 1% interest in our stock in the form of options or warrants for compensation for services he was engaged to perform for us
Settlement Date	'February 19, 2014	'

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 3) - Incentive Arrangements (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2009	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2007	Dec. 31, 2013
			Master Economic Incentives Agreement	Texas Enterprise Fund Grant	Texas Enterprise Fund Grant	Texas Enterprise Fund Grant	Texas Enterprise Fund Grant	Texas Enterprise Fund Grant
			Certain Employment Levels		Certain Employment Levels	Certain Employment Levels	Certain Employment Levels	Certain Employment Levels
						Incentives received	Incentives received	Additional incentives that may be received in future
Incentive Arrangements	'	'	'	'	'	'	'	'
Duration of exemption from most property taxes associated with the Corporate headquarters	'	'	'14 years	'	'	'	'	'
Incentive for meeting certain new job levels in the State of Texas	'	'	'	'	'	$3,500,000	$5,000,000	$13,500,000
Interest rate, per year, on amounts subject to a clawback if we eliminate jobs for which we have drawn funds	'	'	'	'	3.40%	'	'	'
Amount received that was deferred and recorded as other non-current liabilities	$36,268,000	$27,070,000	'	$8,500,000	'	'	'	'

Stockholders_Equity_Details

Stockholders' Equity (Details)	Dec. 31, 2013	Dec. 31, 2012
	classes
	votes
Common Stock	'	'
Shares of common stock legally issued	141,123,904	137,797,855
Shares of common stock outstanding	141,123,904	137,797,855
Number of classes of authorized common stock	1	'
Number of votes per share of common stock owned	1	'
Preferred Stock	'	'
Authorized shares of preferred stock	50,000,000	50,000,000
Shares of preferred stock issued	0	0
Shares of preferred stock outstanding	0	0

ShareBased_Compensation_Detail

Share-Based Compensation (Details 1) - Share-Based Compensation, General

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 31, 2012

Jan. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Stock Options

Stock Options

Stock Options

Stock Options

Stock Options

Stock Options

Stock Options, 7-year term

Stock Options, 10-year term

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Amended and Restated 2007 Long-Term Incentive Plan

Other Stock Plans

Vests ratably over service-period

Cliff-vests at end of service period

Minimum

Stock Options

Stock Options

Granted before the 2012 annual meeting of the stockholders

Granted after the 2012 annual meeting of the stockholders

Minimum

Restricted stock, restricted stock units, performance units and performance shares

Restricted stock, restricted stock units, performance units and performance shares

Share-Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum exercise price of a stock option, as a percentage of the fair market value of a share of common stock as of the date of grant

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

100.00%

'

'

'

Increase in shares available under Stock Plans

'

'

'

'

'

'

'

'

'

'

5,900,000

5,800,000

'

'

'

'

'

'

'

Number of shares deducted from shares available for issuance under Stock Plans for each share granted under Plan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

'

1

1.76

'

Terms of options granted

'

'

'7 years

'7 years

'7 years

'

'

'7 years

'7 years

'10 years

'

'

'

'

'

'

'

'

'

Stock options vesting period

'

'

'4 years

'

'

'4 years

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

Shares authorized

43,041,212

'

'

'

'

'

'

'

'

'

'

'

28,789,197

'

'

'

'

'

14,252,015

Stock options outstanding

9,487,570

9,032,512

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding

13,025,841

11,832,742

'

'

'

'

'

'

'

'

'

'

12,016,730

'

'

'

'

'

1,009,111

Shares available for future grants

5,760,151

'

'

'

'

'

'

'

'

'

'

'

5,760,151

12,000,000

'

'

'

'

0

ShareBased_Compensation_Detail1

Share-Based Compensation (Details 2) - Restricted Stock (USD $)	12 Months Ended				1 Months Ended			12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Feb. 28, 2009	Feb. 28, 2009	Feb. 28, 2009	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
	RSUs and RSAs		RSUs and RSAs	RSUs and RSAs	RSUs	RSUs	RSUs	RSUs	RSUs	RSUs
					Granted in February 2009	Granted in February 2009	Granted in February 2009	Granted in 2013	Granted in 2013	Granted in 2013
					Performance-vesting, dependent on the company's TSR compared to other companies in the Russell 2000 Index	Performance-vesting, dependent on the company's TSR for a 3-yr performance period as compared to other companies in the Russell 2000 Index	Performance-vesting, dependent on the company's TSR for a 5-yr performance period as compared to other companies in the Russell 2000 Index		Service-vesting, ratably over 4-yr service-period	Market-vesting
									installments
Restricted Stock Roll Forward	'		'	'	'	'	'	'	'	'
Number of units or shares outstanding, beginning of year	2,800,230		'	'	'	'	'	'	'	'
Number of units or shares granted	1,542,948		'	'	2,000,000	1,050,000	950,000	1,542,948	1,206,144	336,804
Number of units or shares released	-588,550		'	'	'	'	'	'	'	'
Number of units or shares cancelled	-216,357		'	'	'	'	'	'	'	'
Number of units or shares outstanding, end of year	3,538,271		2,800,230	'	'	'	'	'	'	'
Restricted Stock, Weighted-Average Grant-Date Fair Value	'		'	'	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares outstanding, beginning of year	$25.57		'	'	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares granted	$39.24		$51.78	$36.22	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares released	$35.43		'	'	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares cancelled	$42.23		'	'	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares outstanding, end of year	$28.79		$25.57	'	'	'	'	'	'	'
Restricted Stock, Additional Disclosures	'		'	'	'	'	'	'	'	'
Number of units or shares expected to vest after December 31, 2013	3,106,300	[1]	'	'	'	'	'	'	'	'
Weighted-average grant-date fair value of units or shares expected to vest after December 31, 2013	$29.78	[1]	'	'	'	'	'	'	'	'
Pre-tax intrinsic value of the RSUs and RSAs released	$29.70		$75.50	$7.70	'	'	'	'	'	'
Vesting period	'		'	'	'	'3 years	'5 years	'	'4 years	'3 years
Grant-date fair value of awards	'		'	'	$7	'	'	'	'	'
Number of equal installments in which awards vest	'		'	'	'	'	'	'	4	'
[1]	Includes reduction of shares outstanding due to estimated forfeitures

ShareBased_Compensation_Detail2

Share-Based Compensation (Details 3) - Stock Options (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Stock Options Roll Forward	'		'	'
Number of shares outstanding, beginning of year	9,032,512		'	'
Number of shares granted	3,128,561		'	'
Number of shares exercised	-2,125,859		'	'
Number of shares cancelled	-547,644		'	'
Number of shares outstanding, end of year	9,487,570		9,032,512	'
Stock Options, Weighted-Average Exercise Price	'		'	'
Weighted-average exercise price of shares outstanding, beginning of year	$21.11		'	'
Weighted-average exercise price of shares granted	$43.95		'	'
Weighted-average exercise price of shares exercised	$8.29		'	'
Weighted-average exercise price of shares cancelled	$40.98		'	'
Weighted-average exercise price of shares outstanding, end of year	$30.37		$21.11	'
Stock Options, Additional Disclosures	'		'	'
Weighted-average remaining contractual life of shares outstanding	'5 years 1 month 6 days		'5 years 3 months 7 days	'
Aggregate intrinsic value of shares outstanding	$117,886,000		$480,191,000	'
Number of shares vested and exercisable at December 31, 2013	4,423,014		'	'
Weighted-average exercise price of shares vested and exercisable at December 31, 2013	$15.64		'	'
Weighted-average remaining contractual life of shares vested and exercisable at December 31, 2013	'4 years 2 months 16 days		'	'
Aggregate intrinsic value of shares vested and exercisable at December 31, 2013	109,170,000		'	'
Total pre-tax intrinsic value of stock options exercised	76,400,000		193,100,000	149,200,000
Stock Options, Vested and Expected to Vest	'		'	'
Number of shares vested and exercisable at December 31, 2013 and expected to vest thereafter	8,646,666	[1]	'	'
Weighted-average exercise price of shares vested and exercisable at December 31, 2013 and expected to vest thereafter	$28.98	[1]	'	'
Weighted-average remaining contractual life of shares vested and exercisable at December 31, 2013 and expected to vest thereafter	'5 years	[1]	'	'
Aggregate intrinsic value of shares vested and exercisable at December 31, 2013 and expected to vest thereafter	$117,319,000	[1]	'	'
Stock Options	'		'	'
Stock Options, Additional Disclosures	'		'	'
Number of equal installments in which awards granted during the year vest	4		4	4
Terms of options granted	'7 years		'7 years	'7 years
Stock Options, Fair Value Assumptions	'		'	'
Expected stock volatility (minimum)	46.00%		56.00%	56.00%
Expected stock volatility (maximum)	47.00%		58.00%	57.00%
Expected dividend yield	0.00%		0.00%	0.00%
Risk-free interest rate (minimum)	0.57%		0.50%	0.85%
Risk-free interest rate (maximum)	0.93%		0.77%	2.35%
Expected life	'3 years 9 months 14 days		'	'4 years 9 months
Weighted-average grant-date fair value of options granted during the year	$15.86		$24.38	$18.09
Stock Options | Minimum	'		'	'
Stock Options, Additional Disclosures	'		'	'
Terms of options granted	'7 years		'	'
Stock Options, Fair Value Assumptions	'		'	'
Expected life	'		'4 years	'
Stock Options | Maximum	'		'	'
Stock Options, Additional Disclosures	'		'	'
Terms of options granted	'10 years		'	'
Stock Options, Fair Value Assumptions	'		'	'
Expected life	'		'4 years 9 months	'
[1]	Includes reduction of shares outstanding due to estimated forfeitures

ShareBased_Compensation_Detail3

Share-Based Compensation (Details 4) - Employee Stock Purchase Plan (Employee Stock Purchase Plan, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Employee Stock Purchase Plan, Fair Value Assumptions	'	'
Expected stock volatility (minimum)	32.00%	41.00%
Expected stock volatility (maximum)	62.00%	53.00%
Expected dividend yield	0.00%	0.00%
Risk-free interest rate (minimum)	0.09%	0.06%
Risk-free interest rate (maximum)	0.34%	0.27%
Weighted-average grant-date fair value of shares granted during the year	$16.04	$14.98
Minimum	'	'
Employee Stock Purchase Plan, Fair Value Assumptions	'	'
Expected life	'6 months	'6 months
Maximum	'	'
Employee Stock Purchase Plan, Fair Value Assumptions	'	'
Expected life	'2 years	'2 years
Maximum | Enrollment Date	'	'
Employee Stock Purchase Plan	'	'
Purchase price of common stock, as a percentage of market value	85.00%	'
Maximum | Purchase Date	'	'
Employee Stock Purchase Plan	'	'
Purchase price of common stock, as a percentage of market value	85.00%	'

ShareBased_Compensation_Detail4

Share-Based Compensation (Details 5) - Other (Share-based compensation issued in connection with acquisitions, Restricted Stock)	12 Months Ended
	Dec. 31, 2013
Other	'
Total number of restricted shares of our common stock issued in connection with acquisitions	348,925
Minimum	'
Other	'
Required service period over which restrictions release	'3 years
Maximum	'
Other	'
Required service period over which restrictions release	'4 years

ShareBased_Compensation_Detail5

Share-Based Compensation (Details 6) - Share-Based Compensation Expense (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allocation of share-based compensation expense to income statement line items	'	'	'
Pre-tax share-based compensation	$59,645,000	$41,546,000	$28,773,000
Less: Income tax benefit	-20,080,000	-15,477,000	-9,890,000
Total share-based compensation expense, net of tax	39,565,000	26,069,000	18,883,000
Share-Based Compensation, Aggregate Disclosures	'	'	'
Total unrecognized compensation cost related to restricted stock, options and the ESPP ($)	173,000,000	'	'
Remaining weighted-average period over which the unrecognized compensation cost related to restricted stock, options and the ESPP will be amortized on a straight line basis	'2 years 3 months	'	'
Cost of revenue	'	'	'
Allocation of share-based compensation expense to income statement line items	'	'	'
Pre-tax share-based compensation	12,584,000	9,592,000	7,482,000
Research and development	'	'	'
Allocation of share-based compensation expense to income statement line items	'	'	'
Pre-tax share-based compensation	8,168,000	4,856,000	2,975,000
Sales and marketing	'	'	'
Allocation of share-based compensation expense to income statement line items	'	'	'
Pre-tax share-based compensation	7,317,000	6,379,000	2,408,000
General and administrative	'	'	'
Allocation of share-based compensation expense to income statement line items	'	'	'
Pre-tax share-based compensation	$31,576,000	$20,719,000	$15,908,000

Taxes_Details_1_Provision_for_

Taxes (Details 1) - Provision for Income Taxes and Tax Rate Reconciliation (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Federal	$35,912,000	$38,720,000	$18,372,000
Foreign	12,071,000	19,248,000	14,976,000
State	4,121,000	4,296,000	4,011,000
Total current	52,104,000	62,264,000	37,359,000
Deferred:	'	'	'
Federal	-3,886,000	1,359,000	4,345,000
Foreign	-1,621,000	-910,000	-877,000
State	-2,575,000	-124,000	-809,000
Total deferred	-8,082,000	325,000	2,659,000
Total provision for income taxes	44,022,000	62,589,000	40,018,000
Income Before Income Taxes	'	'	'
Income from foreign operations included in income before income taxes	$39,700,000	$61,600,000	$51,700,000
Reconciliation of Statutory Federal Tax Rate to Effective Tax Rate	'	'	'
Statutory federal tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	0.70%	1.50%	1.90%
Tax rate differentials for international jurisdictions	-3.80%	-2.00%	-4.10%
Permanent differences	1.30%	2.50%	1.80%
Other, net	0.50%	0.30%	-0.20%
Effective tax rate	33.70%	37.30%	34.40%

Taxes_Details_2_Deferred_Taxes

Taxes (Details 2) - Deferred Taxes (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:	'	'
Share-based compensation	$23,487,000	$17,703,000
Accounts receivable	1,275,000	1,232,000
State income taxes	2,293,000	590,000
Vacation accruals	5,235,000	4,033,000
Deferred revenue	3,793,000	3,815,000
Deferred rent	13,736,000	10,477,000
Accruals not currently deductible	7,850,000	7,212,000
Net operating loss carryforwards	3,534,000	5,697,000
Charitable contribution carryforward	754,000	782,000
Foreign tax credit	1,723,000	1,583,000
Research and development credits	13,871,000	3,401,000
Other	1,674,000	-348,000
Total gross deferred tax assets	79,225,000	56,177,000
Deferred tax liabilities:	'	'
Depreciation	125,209,000	108,208,000
Share-based compensation	107,000	821,000
Prepaids	2,981,000	2,593,000
Total gross deferred tax liabilities	128,297,000	111,622,000
Net deferred tax assets (liabilities)	-49,072,000	-55,445,000
Valuation allowance	'	'
Valuation allowance on deferred tax asset	0	'
Deferred Tax Liability Not Recognized, Undistributed Earnings of Foreign Subsidiaries	'	'
Deferred tax liability recognized for undistributed earnings of foreign subsidiaries	0	'
Undistributed earnings of the company's foreign subsidiaries considered indefinitely invested	175,500,000	'
Federal	'	'
Operating Loss and Tax Credit Carryforwards	'	'
Net operating loss carryforwards	250,800,000	'
Tax credit carryforwards	15,600,000	'
Foreign	'	'
Operating Loss and Tax Credit Carryforwards	'	'
Net operating loss carryforwards	$21,400,000	'

Taxes_Details_3_Uncertain_Tax_

Taxes (Details 3) - Uncertain Tax Positions (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	tax_examinations
Reconciliation of Unrecognized Tax Benefits	'	'	'
Balance, beginning of year	$18,664,000	$16,729,000	'
Additions based on tax positions related to the current year	3,919,000	1,946,000	'
Additions for tax positions of prior years	663,000	0	'
Reductions for tax positions of prior years	0	-11,000	'
Balance, end of year	23,246,000	18,664,000	16,729,000
Uncertain Tax Positions, Additional Disclosures	'	'	'
Unrecognized tax benefits that, if recognized, would favorably impact effective tax rate	8,200,000	3,300,000	'
Unrecognized tax benefits that, if recognized, would be recorded as an adjustment to other current and non-current assets	15,100,000	'	'
Accrued interest or penalties related to income tax matters on the consolidated balance sheets	0	0	'
Amount for interest or penalties related to unrecognized tax benefits recorded in the consolidated statements of comprehensive income	0	0	0
Number of income tax examinations currently in process	0	'	'
U.S. federal and state | Minimum	'	'	'
Uncertain Tax Positions, Additional Disclosures	'	'	'
Tax years for which we remain subject to income tax examinations	'2009	'	'
U.S. federal and state | Maximum	'	'	'
Uncertain Tax Positions, Additional Disclosures	'	'	'
Tax years for which we remain subject to income tax examinations	'2013	'	'
Federal	'	'	'
Uncertain Tax Positions, Additional Disclosures	'	'	'
Income tax refunds received	$0	'	'
International jurisdictions | Minimum	'	'	'
Uncertain Tax Positions, Additional Disclosures	'	'	'
Tax years for which we remain subject to income tax examinations	'2007	'	'
International jurisdictions | Maximum	'	'	'
Uncertain Tax Positions, Additional Disclosures	'	'	'
Tax years for which we remain subject to income tax examinations	'2013	'	'

Taxes_Details_4_Other

Taxes (Details 4) - Other (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
			Sale of certain intangible assets to wholly-owned offshore subsidiary
Taxable Transactions	'	'	'
Asset on consolidated balance sheet as a result of taxable transactions	'	'	$38,400,000
Portion of asset on consolidated balance sheet as a result of taxable transactions recorded in other non-current assets	57,089,000	52,777,000	34,800,000
Cash tax impact	'	'	$0

Segment_Information_Details_1_

Segment Information (Details 1) - Geographic Areas (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
									segments
Segment Reporting [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Number of reportable segments	'	'	'	'	'	'	'	'	1	'	'
Total net revenue by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	$408,103	$388,636	$375,847	$362,200	$352,909	$335,985	$318,990	$301,355	$1,534,786	$1,309,239	$1,025,064
Property and equipment, net by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total property and equipment, net	890,776	'	'	'	724,985	'	'	'	890,776	724,985	'
United States	'	'	'	'	'	'	'	'	'	'	'
Property and equipment, net by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total property and equipment, net	654,507	'	'	'	534,275	'	'	'	654,507	534,275	'
International	'	'	'	'	'	'	'	'	'	'	'
Property and equipment, net by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total property and equipment, net	236,269	'	'	'	190,710	'	'	'	236,269	190,710	'
Operating location that enters into contractual relationship with customer | United States	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	1,133,645	973,733	767,752
Operating location that enters into contractual relationship with customer | International	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	401,141	335,506	257,312
Customer's billing address | United States	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	1,076,248	'	'
Customer's billing address | International	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by geographic region	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	$458,538	'	'

Segment_Information_Details_2_

Segment Information (Details 2) - Revenue by Product Categories (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total net revenue by product categories	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	$408,103	$388,636	$375,847	$362,200	$352,909	$335,985	$318,990	$301,355	$1,534,786	$1,309,239	$1,025,064
Dedicated Cloud	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by product categories	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	1,119,636	1,005,165	835,877
Public Cloud	'	'	'	'	'	'	'	'	'	'	'
Total net revenue by product categories	'	'	'	'	'	'	'	'	'	'	'
Total net revenue	'	'	'	'	'	'	'	'	$415,150	$304,074	$189,187

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. Defined Contribution Plan	'	'	'
Defined Contribution Plans	'	'	'
Maximum voluntary tax-deferred contributions, as a percentage of gross compensation	100.00%	'	'
Contribution expense recognized for defined contribution plan	$6.50	$4.80	$3.90
International Defined Contribution Plans	'	'	'
Defined Contribution Plans	'	'	'
Contribution expense recognized for defined contribution plan	$3.80	$2.60	$1.90

Schedule_of_Valuation_and_Qual1

Schedule of Valuation and Qualifying Accounts (Details) (Allowance for Doubtful Accounts and Customer Credits, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts and Customer Credits	'	'	'
Movement in Valuation Allowances and Reserves	'	'	'
Beginning Balance	$4,236	$3,420	$2,846
Additions Charged to Net Revenues and Costs and Expenses	8,167	9,411	9,063
Write-offs of Accounts Receivable and Credit Memos Paid	-8,512	-8,595	-8,489
Ending Balance	$3,891	$4,236	$3,420

Supplementary_Financial_Data_U2

Supplementary Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplementary Financial Data (Unaudited)	'	'	'	'	'	'	'	'	'	'	'	'
Net revenue	$408,103	$388,636	$375,847	$362,200	$352,909	$335,985	$318,990	$301,355	$1,534,786	$1,309,239	$1,025,064	'
Cost of revenue	133,821	127,404	117,658	113,610	109,012	107,348	102,572	100,081	492,493	419,013	346,341	'
Gross profit	274,282	261,232	258,189	248,590	243,897	228,637	216,418	201,274	'	'	'	'
Net income	20,798	16,311	22,367	27,261	29,907	27,197	25,134	23,180	86,737	105,418	76,411	'
Earnings Per Share, Basic	$0.15	$0.12	$0.16	$0.20	$0.22	$0.20	$0.19	$0.17	$0.63	$0.78	$0.59	'
Earnings Per Share, Diluted	$0.14	$0.11	$0.16	$0.19	$0.21	$0.19	$0.18	$0.17	$0.61	$0.75	$0.55	'
Cash and cash equivalents	$259,733	$269,995	$263,052	$278,627	$292,061	$257,651	$215,448	$186,531	$259,733	$292,061	$159,856	$104,941